Now，imagine we're deep space explorers and we've found something out in space that is both extremely heavy and very small.This mysterious object would pull so powerfully that nothing inside could escape to the outside. （1）AA Again imagine we stay in our spaceship at a safe distance and make a movie of this black hole.（2）FFWe would instead see the black hole eat anything that came too close.We get lucky：as we watch，the black hole swallows an entire star!
Our movie，titled " Black hole eats a star " gets a million views online. （3）GGIn the movie played backwards，we'd see a very heavy，very small object just sitting there—and then，all of a sudden，spit out an entire star!The object we're looking at now，which spits everything out and eats nothing，would be called a white hole.
Are there white holes？We have good evidence from our telescopes that black holes really do exist.（4）DD That astronomers think about white holes is because of Albert Einstein.He came up with an excellent idea about gravity.His theory describes how black holes work，with their huge gravitational pull and also says white holes are possible.So could our universe actually make a white hole？（5）EE ？Probably not.Something can be"possible"as an idea，but also extremely unlikely in real life.
White holes are unlikely because they are an"in reverse"kind of thing.Time in our universe only flows in one direction：forward.So for now，white holes are just in interesting possibility.
| A.This kind of object is a black hole. B.Is there a white hole in the universe？ C.Now picture yourself near a black hole. D.However，we've never seen a white hole. E.And could a black hole become a white hole？ F.We'd never see anything escape from the black hole. G.But now imagine what would happen if we played it in reverse. |
【答案】A；F；G；D；E
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發布：2024/4/20 14:35:0組卷：4引用：1難度：0.5
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1．China plans to complete the construction of a space station and have（1）
put into operation around 2022，said Zhou Jianping，the chief designer of China's manned space program，at a forum（論壇）（2）（hold） in south China's Guangdong Province．The space station（3）（design） to weigh 100 tonnes and accommodate three astronauts，（4）could be enlarged if needed，according to Zhou．
"The main goal of the construction of the space station is to enable China to become a country（5）（independent） mastering the technology for long term manned flight in near Earth space，and having the capability to carry out long-term manned scientific（6）（experiment） in near Earth space and comprehensive development and utilization（利用） of space resources，"（7）（say） Zhou at the 4th China Summit Forum on Human Factors Engineering，which was held at Sun Yat-sen University from Saturday to Sunday，
The space station will be built as China's main platform for space science research，（8）the intention of mastering the technologies in constructing and（9）（operate） large space facilities，the technologies that guarantee life and health of astronauts who often fly in orbit，and the construction of a（10）（nation） space lab，according to Zhou．發布：2024/12/6 8:30:1組卷：25引用：5難度：0.7 -
2．In 1969，when Neil Armstrong first landed on the Moon，many people thought soon we would be regularly visiting other planets.（1）
The reality is that space exploration is extremely difficult and dangerous.Some people believe it is a waste of the public purse and does nothing to improve our lives.Why do we continue to explore space，then？
（2）From the very early days of human life on the Earth，our curiosity about the unknown has kept us adventuring into new places.While space exploration is a reality，we remain curious about the mysteries of the universe.With each space mission comes greater insight，thus motivating us to continue along the same path of adventure.
With technologies developed for space exploration，we can solve some big problems facing mankind，making our lives safer and easier.（3）Originally applied to the space shuttle launch，they have also been set up in the cities with a high frequency of earthquakes to protect buildings and save lives.
Although space exploration demands huge investment，it can actually bring great economic value.The global space economy is increasing by billions of dollars every year.（4）Jobs in the space industry go far beyond the astronauts.There are many support staff on the ground，such as engineers and research assistants.
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A.This is clearly not the case.
B.It is in our nature to explore.
C.The universe is too mysterious to explore.
D.One of these is earthquake shock absorbers.
E.It can also provide a variety of career opportunities.
F.These scientific and technological advances can benefit societies in many areas.
G.When you've seen a man walk on the Moon，you grow up believing anything is possible!發布：2025/1/1 16:30:1組卷：5引用：2難度：0.5 -
3．（1）
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China's space programme started later than those of Russia and the US，but it（8）（make）great progress in a short time.China became the third country in the world to （9）（independent） send humans into space in 2003.Now China as well as Europe and the US has plans to further study and explore plants like Mars （10）Jupiter.發布：2025/1/1 5:0:1組卷：5引用：2難度：0.5