专题21 主题阅读-航空航天-2025年中考英语一轮复习阅读理解精讲精练(通用版)

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航空航天类语篇往往具有浓厚的科技感，通过描述航空航天技术的发展和应用，展现人类探索宇宙的决心和成就。例如，文章中可能会提到卫星的发射、探测器的探测任务、宇航员在太空中的生活和工作等，这些都充满了科技感和未来感。这类语篇呈现如下特征：（1）强调探索与创新：航空航天类语篇通常会强调探索与创新的重要性。通过介绍航空航天领域的重大发现和突破，如火星探测、月球登陆等，激发学生的好奇心和探索欲，鼓励他们勇于创新和追求未知。（2）培养科学精神：这类语篇注重培养学生的科学精神。通过讲述科学家和工程师们在航空航天领域中的努力和贡献，以及他们面对困难和挑战时的坚持和勇气，引导学生树立科学态度，尊重科学规律，追求真理和进步。（3）关注国际合作：航空航天领域通常涉及国际合作和交流。在语篇中，可能会提到不同国家之间的合作项目、共同研发的成果等，这有助于学生认识到国际合作在推动航空航天事业发展中的重要作用。（4）主题词汇丰富：航空航天类语篇通常会包含大量与航空航天相关的专业词汇，如“spaceship”（航天器）、“satellite”（卫星）、“rcket”（火箭）、“astrnaut”（宇航员）、“rbit”（轨道）等。这些词汇的出现不仅丰富了学生的词汇量，也帮助他们更好地理解和认识航空航天领域。这些特征不仅有助于提高学生的英语阅读能力，还能激发他们的学习兴趣和探索欲，培养他们的科学素养和国际视野。
常用词汇积累
1.名词
aircraft飞机‌
spacecraft / spaceship航天器 / 宇宙飞船‌
satellite卫星‌
rcket火箭
astrnaut宇航员‌
space statin空间站
launch发射‌
rbit轨道‌
galaxy星系‌
universe宇宙‌
missin任务‌
prbe探测器‌
manned spaceflight载人航天‌
unmanned spaceflight无人航天‌
spacewalk太空行走‌
gravity重力‌
atmsphere大气层
explratin探索活动
2.动词‌
launch发射
explre探索
rbit绕……轨道飞行
land着陆
travel旅行
sar翱翔
cnnect连接
achieve实现
3.‌形容词‌
advanced先进的
space-bund飞向太空的
extraterrestrial外星的
csmic宇宙的，与宇宙相关的
rapid快速的
successful成功的
manned有人驾驶的[与无人驾驶（unmanned）相对]
‌
突破练习
1
①Have yu heard f China’s Tiangng space statin? Hw much d yu knw abut the lives f astrnauts wrking in the space statin? Cme alng and find ut!
②Fr astrnauts in space, exercise is imprtant. The envirnment is very different in space. Ding sprts can help astrnauts stay healthy. Hw d they exercise? There is a spin bike (健身车), a running machine, and ther fitness equipment in the space statin. The equipment makes it easy fr astrnauts t exercise.
③Astrnauts live in a weightless envirnment, s they can’t take shwers like we d n the earth. Is there a bathrm in the space statin? Hw d they keep themselves clean? Dn’t wrry! Tiangng has a special bathrm. Astrnauts can wipe themselves clean with a wet twel (毛巾) .
④What d astrnauts eat in the space statin? There is bread and prridge fr breakfast. There are als traditinal Chinese dishes, like Kung Pa Chicken, fried rice and fried ndles with sliced prk. There is a special “fridge” t stre the fd. It’s made f “aergel (气凝胶)”. The fd stays cl in it.
⑤What if astrnauts miss their family? There is special cmmunicatin equipment in the space statin. Astrnauts can have persnal “sky-t-earth” calls with their family. Usually, the astrnauts wear earphnes. It nt nly helps them talk with each ther, but als allws them t talk t the grund frm any psitin.
⑥What d yu think f the lives f the astrnauts?
1．In Paragraph One, the writer leads int the tpic by _____________.
A．using sayingsB．listing numbers
C．asking questinsD．giving examples
2．What des the wrd “fitness equipment” prbably mean in Paragraph Tw?
A．things fr exercisingB．things fr keeping fd
C．things fr cmmunicatingD．things fr keeping clean
3．Which f the fllwing is TRUE accrding t this passage?
A．Astrnauts hardly exercise in the space statin.
B．Astrnauts use dry twels t clean their bdies.
C．Nthing delicius is available in the space statin.
D．It’s easy fr astrnauts t talk with their family.
4．Which is the best structure f the passage?
(①=Paragraph 1 ②=Paragraph 2, …)
B．
C． D．
5．Where is the passage prbably frm?
A．China FdB．China DailyC．China MedicineD．China Trade
2
Have yu ever seen peple building huses? T build a huse, yu need wrkers. They use their hands, tls (工具) and machines t put things tgether. Building the Internatinal Space Statin (国际空间站) is the same. The difference is that the wrkers are astrnauts. They walk in space and use rbts’ arms and hands t d the wrk.
In the space statin, astrnauts are cmfrtable. The temperature there is abut 21℃. But utside f the statin, it can be t ht r cld fr peple. In the sunlight (暗处) f the statin, it’s abut -85℃. S when astrnauts walk in space, they have t wear heavy clthes—spacesuits.
These suits als keep astrnauts safe frm flying rubbish in space. Each time peple g int space, they leave rubbish there. S astrnauts shuld be careful because there’s a lt f rubbish, and sme rubbish ges many times as fast as a plane!
Space walking is nt easy, and it can be dangerus. S getting ready fr it takes a lt f time t learn. Astrnauts will need t d 160 space walks t finish their wrk in the space statin. That will take abut 1,900 man-hur wrk.
1．What’s the temperature in space statin?
A．Abut 21℃.B．Abut 120℃.
C．Abut -85℃.D．We dn’t knw.
2．The astrnauts build the space statin with ________.
A．scientists’ handsB．sme machines
C．rbts’ arms and handsD．wrkers’ hands
3．Which f the fllwing is TRUE accrding t the passage?
A．Space walking is very safe.
B．Space walking is difficult.
C．Space walking is very cmfrtable.
D．Astrnauts needn’t wear spacesuits when walking in space.
4．What’s the meaning f the underlined wrd “spacesuits” in the passage?
A．太空服B．防弹衣C．雨衣D．防护服
5．Why d astrnauts need t wear spacesuits when walking in space?
①keep astrnauts frm t ht r cld temperature
②help astrnauts flying in space
③keep astrnauts safe frm flying rubbish in space
④help astrnauts take fd with them
A．①②B．②④C．①③D．③④
3
Did yu knw that humans haven’t walked n the mn surface (月球表面) since 1972? Peple are planning t send astrnauts t the mn again, and finally t the Mars. The lng-term space travel is pssible in the near future. But it is dangerus. We have plenty f technlgy fr safely explring (探索) space. D we really need t send peple? Here are sme students’ pinins.
We still need t send humans int space. If we dn’t slve the prblem f climate change, the planet culd becme nt fit t live in. We need t find ut whether living n Mars is pssible. The rbtic missin (使命) is t send back a lt f infrmatin. But it wn’t be enugh t help us understand hw we wuld face n anther planet.
—Elisha Lee, 11, Wilmette, Illinis.
As a future engineer, I believe in space technlgy. Rbts can stay in space lnger and rbts’ lives are nt at risk. They culd stay n the mn r Mars fr many years, ding research, with n danger t human life.
—Lin Marrer, 15, Frisc. Texas.
Humans shuld cntinue ging t space. Rbts can cllect infrmatin, but they can’t respnd (反应灵敏) like humans in all situatins. We culdn’t depend n them t develp an area that wuld be dangerus fr humans.
—Kellen Bhatt, 11, Alpharetta, Gergia.
We shuld nt send humans int space, at least nt nw. Sending humans int space needs a lt f mney. The same mney culd be used fr slving prblems n Earth. I’m nt saying that space explratin shuld never happen. But fr nw, we shuld fcus n dealing with the prblems we have n Earth.
—Samira Hrtn, 13, Brklyn, New Yrk.
1．What des the underlined wrd “it” in paragraph 1 refer t?
A．Mn surface walking.B．Mars surface walking.
C．Safe space explring.D．Lng-term space travel.
2．Wh might be against sending peple t explre space?
A．Elisha Lee and Kellen Bhatt.B．Lin Marrer and Samirah Hrtn.
C．Elisha Lee and Lin Marrer.D．Kellen Bhatt and Samirah Hrtn.
3．What des Elisha Lee agree?
A．Sending humans int space is still necessary.
B．Rbts will slve the prblem f climate change.
C．It is pssible fr humans t live n Mars.
D．The prblem f cl mate change is nt serius.
4．Where can we read the passage?
A．In a weather reprt.B．In an instructin bk.
C．In a newspaper interview.D．In a gardening magazine.
5．What’s the crrect structure f the passage?
A．B．C．D．D
4
Frm the mn t Mars, scientists have been lking fr water — the key t life — in the slar system fr many years. Recently, they have turned t Jupiter(木星)!
Jupiter is a gas giant(巨星). It desn’t have an Earth-like surface. We can see strips(条纹) arund it. They are actually cld, windy cluds.
On April 14, the Eurpean Space Agency’s (ESA) JUICE spacecraft successfully lifted ff frm French Guiana in Suth America. JUICE, shrt fr “Jupiter Icy Mns Explrer”, will cllect data(数据) frm Jupiter and its three mns, Eurpa, Ganymede and Callist.
The three mns are believed t have big ceans f liquid water(液态水) under their icy shells(壳). Accrding t ESA, he water n thse mns culd be six times as much as the amunt in Earth’s ceans. The missin “will change ur understanding f the slar system”, wrte Scientific American.
In 1998, NASA’s Galile spacecraft fund that Eurpa might be ejecting(喷射) water as far as 160 kilmeters int space. That gave scientists the idea f studying the icy mns f Jupiter.
The ceans under these mns are likely t be tens f kilmeters deep. But they are als trapped under tens f kilmeters f ice, making it very difficult t study them. Althugh JUICE cannt land n the surface, it has lts f high-tech equipment t study the mn’s envirnment, including spectral imaging(光谱成像) tls and radar(雷达). They culd give mre data n things like the thickness f the ceans, their salt cntent(含量), and their distance frm the icy shells abve, reprted Phys.rg.
“The main gal is t understand whether there are habitable (可居住的) envirnments amng thse icy mns and arund a giant planet like Jupiter,” JUICE team member Olivier Witasse said during a press cnference (发布会) n April 6.
1．What d we knw abut JUICE?
A．It will becme ne f Jupiter’s mns.B．It will cllect data frm Jupiter and its mns.
C．It gt its name frm hw it lks.D．It left fr Jupiter frm the US.
2．The water n Eurpa might ________.
A．be six times as much as the amunt in Earth’s ceansB．be cmmn t see n ther planets
C．have been ejected frm the planet int spaceD．mainly cme frm the planet’s icy shells
3．Which f the fllwing wrds can replace the wrd “trapped” in Paragraph 5?
A．lstB．caughtC．keptD．taken
4．Accrding t Paragraph 6, what can JUICE d?
A．It can land and cllect samples n the grund.
B．It can get infrmatin abut the ceans by radar.
C．It can get water samples frm deep under the icy shell.
D．It can break the ice n Jupiter’s mns.
5．What is the missin’s gal?
A．T test ways f keeping water n Eurpa, Ganymede and Callist.
B．T find ut if Jupiter has living things similar t human beings.
C．T figure ut if it is pssible fr life t live n sme mns.
D．T mve water frm Earth t mns like Eurpa, Ganymede and Callist.
5
Oxygen extracted frm Mars air (从火星空气中提取氧气)
Natinal Aernautics and Space Administratin (NASA) achieved anther first during its latest missin n Mars. It successfully turned carbn dixide (二氧化碳) frm the air f Mars int fresh, breathable xygen.
The extractin f xygen ut f thin air n Mars was dne by a device called MOXIE. The device n Perseverance (毅力号) is abut the size f a taster (烤面包机). “In its first run, it created abut five grams f xygen. That is what an astrnaut wuld need in rder t be able t breathe fr abut 10 minutes,” NASA said. The achievement marked the first experimental extractin f a natural resurce frm anther planet fr direct use by humans.
MOXIE isn’t just the first device t prduce xygen n anther planet. It is the first technlgy f its kind that can help future missins t “live ff the land” f anther planet. Oxygen is nt nly a surce f breathable air fr astrnauts, but als an imprtant element fr the prductin f the rcket fuel (燃料) that will be needed t send them back hme.
Accrding t a researcher at NASA, taking a ne-tn machine t Mars was much easier than trying t carry 25 tns f xygen frm the earth. Astrnauts living and wrking n Mars wuld need abut ne tn f xygen t last (维持) the whle year.
MOXIE is designed t create up t 10 grams f xygen an hur. During the first tw years f Perseverance’s jurney, NASA plans t run it at least anther nine times.
When astrnauts finally take their first breaths f lcally made xygen n Mars, they may have this taster-size device t thank.
1．In 20 minutes, tw astrnauts need ________ grams f xygen.
A．10B．15C．20D．25
2．Which f the fllwing is TRUE accrding t the passage?
A．MOXIE has successfully turned the air n Mars int xygen again.
B．NASA has run the device 9 times during the tw years f Perseverance’s jurney.
C．MOXIE did the experimental extractin f a natural resurce frm anther planet.
D．Carrying 25 tns f xygen was much easier than taking a machine t Mars.
3．What d we knw abut MOXIE?
A．It is as heavy as a taster.
B．It is the first device t prduce xygen.
C．It can create xygen fr humans t breathe in the wrld.
D．It is the first technlgy f its kind t help future missins.
4．MOXIE created xygen in rder t be used ________.
A．as the rcket fuelB．t prduce drinking water
C．t turn int carbn dixideD．as a surce f breathable air fr astrnauts
5．In which part f a newspaper can we find the passage?
A．Science.B．Sprts.C．Amusement.D．Culture.
6
The Zhurng rver was transprted n a lng jurney t Mars by the Tianwen-1 spacecraft which began rbiting (绕行) the red planet in February. The rver tuched dwn n the surface f the planet befre midnight n May 15, 2021.
It is an imprtant event fr China, as nly the US had ever managed t land smething n ur neighbring planet befre Zhurng. Sme ther cuntries have als tried befre, but their rvers have either crashed (坠毁) r lst cntact after landing. Chinese leaders cngratulated the missin team n its “utstanding achievement”.
Less than a week after its landing, Zhurng returned its first tw pictures. One is a black-and-white pht taken thrugh a fisheye lens (鱼眼镜头) shwing a view f where it landed. The ther is in clr, shwing a view f the rver’s slar panels (太阳能电池板).
If things g as planned, Zhurng will spend at least three mnths studying the lcal envirnment arund it and lking fr signs f water ice (水冰) n the Martian surface.
“Mars is the mst likely planet in ur slar system fr us t live n in the future. That’s why we want t explre it.” Ge Jian, a Chinese scientist said. “Tianwen-1 and Zhurng will set the stage fr future Mars missins, including a sample (样本) return missin set t take place in the 2030s.”
1．When did the Zhurng rver begin rbiting Mars?
A．In February.B．In May.C．In 2020.D．In 2030.
2．What can we learn frm Paragraph 2?
A．The US failed t land smething n Mars.
B．Only tw cuntries landed their rvers n Mars.
C．All the rvers crashed r lst cntact after landing.
D．Many cuntries managed t land smething n Mars.
3．Which f the fllwing is TRUE accrding t Paragraph 3?
A．Zhurng has sent tw pictures befre its landing.
B．The pictures that Zhurng sent were all black and white.
C．Zhurng shwed a view f where it landed thrugh a fisheye lens.
D．The black-and-white pht shwed a view f the rver’s slar panels.
4．What will Zhurng d n Mars as planned?
A．Begin rbiting the red planet.
B．Study the lcal envirnment arund it.
C．Tuch dwn n the surface f the planet.
D．Lk fr signs f water ice n the earth surface.
5．What can we knw frm the last paragraph?
A．We will live n Mars in the 2030s.
B．Zhurng will cntinue t explre Mars.
C．Tianwen-1 has als returned the pictures n Mars.
D．We explre Mars because it is suitable fr humans t live n.
7
Fr the first time, scientists have grwn plants in mn sil（土壤）cllected by NASA’s Apll astrnauts.
The scientists had n idea if anything wuld grw in mn sil. They wanted t see if it culd be used t grw plants. Rbert Ferl f the University f Flrida was surprised with the results. “Plants actually grw in mn sil,” he said.
Ferl and ther researchers planted thale cress, a small flwering plant, in mn sil. The gd news was that all f the seeds（种子）grew. The bad news was that after the first week, they grew slwly. Mst f the plants ended up small and nt fully develped.
Scientists fund that the lnger the sil was n the mn, the wrse the plants seemed t grw. The sil cllected by the Apll 11 was the least helpful fr grwth. ★ . One slutin might be t use yunger sil n the mn, like lava（火山岩浆）, r put in sme special nutrient（营养物） mixtures.
Only 382 kilgrams f mn rcks and sil were brught back by the six Apll grups that landed n the mn. Early last year, NASA finally gave ut 12 grams f sil fr the planting experiment（实验）.
The Flrida scientists hpe t reuse their mn sil later this year, planting mre thale cress befre pssibly mving n t ther plants.
A scientist said, “Grwing plants is a big step frward. The real next step is t g and d it n the surface f the mn.”
1．What did Rbert Ferl think f the results f the planting experiment?
A．Surprising.B．Disappinting.C．Awful.D．Regretful.
2．What d the Flrida scientists plan t d this year?
A．T find sme yunger sil n the mn.
B．T make sme special nutrient mixtures.
C．T plant sme ther plants in new mn sil.
D．T use the mn sil again in the experiment.
3．Which f the fllwing can be put in ★ ?
A．It was fully used by researchers
B．It weighed less than 283 kilgrams
C．It was the newest sil n the mn
D．It was a cuple billin years lnger
4．What may be the real purpse f the planting experiment?
A．T cllect mre sil frm the mn.
B．T send mre scientists t the mn.
C．T grw plants n the mn surface.
D．T plant mre thale cress n the mn.
5．What can we infer frm the passage?
A．Mst f the plants grew well after tw weeks.
B．The sil cllected by the Apll 11 is the ldest.
C．It is easy fr astrnauts t bring back mn sil.
D．Scientists fund n ways t imprve the experiment.
8
On March 23, 2022, Chinese astrnauts in China’s Tiangng space statin gave a science lessn 400 kilmeters abve Earth. It was a great success. D yu remember the first space lessn hsted by Wang Yaping in 2013? She gave the lessn t mre than 60 millin schl children all ver the cuntry.
While watching the science lessn frm the Tiangng-1 n June 20, 2013, Wang Lutian, a 10-year-ld disabled student at a special schl in Beijing, was drawing a rcket in his classrm. “Mn…stars…a rcket t the sky,” Wang explained his wrk cheerfully. At that time, he and 100 ther disabled students were enjying the lessn given by Wang Yaping, wh talked abut mvements in micrgravity (微重力) envirnments. “Zer gravity!” Qian Shahng, anther student, shuted when he saw astrnaut Nie Haisheng shwing his crssing legs in mid-air. “Scientific knwledge has pened a windw fr children t knw abut the wrld,” said a teacher at the schl.
The lessn als increased interest in space science amng teenagers living n the “rf (屋脊)f the wrld.” “I was mst interested in the experiment f the ‘water ball’ in a gravity-free envirnment. It’s amazing,” said Rigzin Jigme Dje, a high schl student in Lhasa, Xizang. As a lver f physics, Dje said the lessn helped him stay true t his dream f becming a physicist.
The lessn als encuraged ther Xizangan students t cnnect the mysterius wrld f uter space t their hmetwn.
1．The space lessn in 2013 was fr ________.
A．Chinese astrnautsB．Chinese teachers
C．schl children in ChinaD．scientists all ver China
2．Which picture shws Nie Haisheng’s bdy mvement accrding t the text? ________
A．B．
C．D．
3．What is Paragraph 2 mainly abut?________
A．Wang Yaping’s talk n micrgravity envirnments.
B．The influence f the space lessn n the disabled students.
C．The effrts f the disabled students in a special schl.
D．A10-year-ld student’s dream f sending a rcket t the sky.
4．What d we knw abut Rigzin Jigme Dje?________
A．He liked drawing stars.B．He talked a lt abut his wrk.
C．He was a primary schl student.D．He was fnd f physics.
5．After watching the space lessn, the Xizangan students ________.
A．had a new view f their high schls
B．gt an amazing “water ball” in space
C．increased an understanding f the rf f the wrld
D．develped a deep interest in the wrld f uter space
9
Can anyne be an astrnaut?
Of curse nt. Yu dn’t have t have a science degree but mst astrnauts d. Mst f them are pilts t. Life in a spaceship is hard s yu must have a healthy bdy and mind. Yu need t be easy ging, patient, and helpful t spend s much time in a small space with ther peple.
What’s the training like?
Peple have t train fr a year t learn hw t stay healthy and safe. They practise space walking and living in zer gravity. They train in difficult cnditins t learn hw t slve prblems and t wrk in a team. Everyday tasks like eating, washing and sleeping can be difficult in a spaceship. There is n running water s yu have t wash with wet tissues; it’s hard t enjy the dry fd that astrnauts have t eat. And t sleep yu must cver yur eyes because the sun rises every 90 minutes n the Internatinal Space Statin. Yu als have t tie yurself t smething s yu dn’t fly away!
What health prblems d astrnauts have?
Life in zer gravity causes changes t ur bdies. Bnes and muscles(肌肉) becme thin and weak s yu must d a lt f exercise in space t stay fit and t help the heart mve bld arund yur bdy. Astrnauts ften get backache because peple grw in space-up t 8 centimeters! It’s als cmmn t have headaches and t feel sick, especially at the beginning. Yu must have vitamins t take the place f fresh fruit and vegetables. But yu dn’t have t put n sun cream because space suits prtect yur skin.
Are yu still interested?
S nw yu knw. If yu want t g t space, study hard, learn t fly and take care f yur bdy and mind.
1．What is a must fr an astrnaut?
A．A science degree.B．A pilt’s license.
C．A healthy bdy and mind.D．A weak character.
2．What must yu d t prepare fr a space trip?
A．Experience zer gravity.B．Wash with running water.
C．Practise lng walks.D．Sleep with yur eyes pen.
3．Why d astrnauts have t exercise in space?
A．T make their bnes and muscles thinner.B．T help the heart wrk well and keep fit.
C．T avid backache and grw much taller.D．T stp their skins frm getting sunburned.
4．What might happen t astrnauts n the Internatinal Space Statin?
A．Their skin will be injured.B．They can wash with running water.
C．They can eat a lt f fruit and vegetables.D．They may have headaches and feel sick.
5．What is the text mainly abut?
A．What we need t knw t becme an astrnaut.
B．Why yung peple are interested in space trips.
C．What prblems astrnauts must slve in space.
D．Why we need t train hard befre a space trip.
10
Accrding t Ken Crswell, the Sun and the Mn are different. We ften think that the Sun rules the day and the Mn rules the night. That’s kind f right, but nt ttally.
The Sun shines all the time. It shines during the day when we see it, and even at night when we dn’t.
As the Earth turns, smetimes we face the Sun. That’s when we get day. When the Earth’s spin (自转) turns us away frm the Sun and we are in the Earth’s shadw, we get night. When peple n the ppsite side f the Earth face the Sun, thse peple have day while we have night.
The Mn is a different stry. Unlike the Sun, it desn’t make its wn light. Mnlight is actually the Sun’s light reflecting(反射) the Mn back t us.
The Sun lights up nly the side f the Mn that faces the Sun. At Full Mn, the Mn is n the ppsite side f the Earth frm the Sun. Then the side f the Mn facing the Earth is all lit up. During Full Mn, the Mn rises arund sunset, shines all night, and sets arund sunrise. Since he mnlight is s bright, yu can smetimes see it during the day, t. A few days befre Full Mn, if yu lk east in the afternn, yu may see the Mn in the sky. After Full Mn, yu may find it if yu lk west in the mrning.
The Mn is mst difficult t see at New Mn, when its rbit(轨道) puts it between the Earth and the Sun. Then, the side f the Mn facing the Earth is dark and we can’t see the Mn at all.
1．What can we knw abut the Sun?
A．The Sun rules the Mn.
B．The Sun shines during bth day and night.
C．The Sun lights up all the sides f the Mn.
D．The Sun shines everywhere n the Earth at the same time.
2．Which f the fllwing in the dictinary best explains the underlined wrd “shadw” in Paragraph 3?
shadw n.
①the shape f the Earth
②the frce frm the Sun
③the dark area n the Earth
④the ppsite side f the Sun
A．①B．②C．③D．④
3．What des Paragraph 5 mainly talk abut?
A．Hw the Mn makes its light.
B．Why there is day and night n the Earth.
C．Why the Mn can be seen during the day.
D．What the difference is between Full Mn and New Mn.
4．Which fllwing picture shws us New Mn?
A．B．
C．D．
5．What is the theme(主题) f the text?
A．Culture.B．Science.C．Educatin.D．Technlgy.