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专升本英语
Unless we spend money to spot and prevent asteroids(小行星）now,now might crash into Eanh
and destroy life as we know it,say some scientists.
Asteroids are bigger versions of the meteoroids(流星）that race across the night sky.Most orbit
the sun far from Earth and don.t threaten us.But there are also thousands of asteroids whose orbits put
them on a collision course with Earth.
Buy$50 million worth of new telescopes right now.Then spend$10 million a year for the next 25
years to locate most of the space rocks.By the time we spot a fatal one,the scientists say,we.1l hawe
a way to change its course.
Some scientists favor pushing asteroids off course with nuclear weapons.But the cost wouldn.t be
cheap.
Is it worth it?Two things experts consider when judging any risk are:(1)How likely the evem
is;and(2)How bad the consequences if the event occurs.Experts think an asteroid big enough to
destroy lots of life might strike Earth once every 500,000 years.Sounds pretty rare-but if one did fal,
it would be the end of the world."If we don.t take care of these big asteroids,they.11 take care of us,
says one scientist."It.s that simple."
The cure,though,might be worse than the disease.Do we really want fleets of nuclear weapons
siting around on Earth?"The world has less to fear from doomsday(毁灭性的）rocks than fromt
great nuclear fleet set against them,"said a New York Times article.
What does the passage aay about asteroids and meleoroide?(对应表比较的信号词：第二段
一行的 bigger)
A.They are heavenly bodies different in composition.
B.They are heavenly bodies similar in nature.
C.There are more asteroids than meteoroids.
D.Asteroids are more mysterious than meteoroids.
What do scientists say about the collision of an asteroid with Earh?(对应表示转折的信号同：
第二段第二行中的but)
A. It is very unlikely but the danger exists.
B.Such a collision might occur once every 25 years.
C.Collisions of smaller asteroids with Earth occut more often than expected.
D.It.s still too early to say whether such a collision might oecur.
What do people think of the suggestion of using nuelear weapons to alter the course of asteroide?
（对应表示比较的信号词：未段第一行中的 worse)
A.It sounds practical but it may not solve the problem.
B.It may create more problems than it might solve.
C. It is a waste of money because a collision of asteroids with Earth is very unlikely.
D.Further research should be done before it is proved applicable.
More than 30,000 drivers and front seat passengers are killed or seriously injured each year.At a speed of only 30 miles per hour it is the same as falling from a third-floor window.Wearing a seat belt saves lives;it reduces your chance of death or serious injury more than half. Therefore drivers or front seat passengers over 14 in most vehicles must wear a seat belt.If you do not,you could be fined up to&50.It will not be up to the drivers to make sure you wear your beht.But it will be the driver.s responsibility to make sure that children under 14 do not ride in the front unleas they are wearing a seat belt of some kind. However,you do not have to wear a seat belt if you are reversing your vehicle;or you are making a local delivery or collection using a special vehicle;or if you have a valid medical certificate which excuses you from wearing it.Make sure these circumstances apply to you before you decide not to wear your seat belt.Remember you may be taken to court for not doing so,and you may be fined if you cannot prove to the court that you have been excused from wearing it. 1.Wearing a seat belt in a vehicle A.reduces road accidents by more than half B.saves lives while driving at a speed up to 30 miles per hour C.reduces the death rate in traffic accidents D.saves more than 15,000 lives each year
-Was the housemaster strict? －Yes,he requested that we television on week nights. A.not watch B.must not to watch C.not be watching D.have not watched
Are the terms"pure"and"applied"two totally different activities,having litle or 0o interconnection,as often implied? A.is B.are C.that D.what
.Surely he won.t deny there on that occasion. A.to be B.having been C.to have been D.he be
She is always. others. A.so glad to help B.too glad not to help C.too glad to help D.glad enough not to help
He was in the accident and taken to hospital. A.knocked out B. knocked off C.knocked at D.knocked to
The weather being unfavorable,they had to the sports meet. A.put out B.put off C.put up D.put on
You our case very convincingly.The jurors were clearly impressed. A. represented B.presented C.promoted D.probed
The teacher asked us to write a in one hour. A.two-hundred-word composition B.two-hundred words composition C.two-hundreds-words composition D.two hundreds of words composition
.If he promises that he will spare no effort in promoting public welfare. A. elected B.elect C.electing D.being elected
the PLA men the villagers would not have survived the flood. A.It had not been for B. Had it not been for C.Were it not for D.Has it not been for
.If law and order not preserved,people will not be able to live a secure life. A.are B.were C.is D.was
There is not much time left for you to cover everything,you.d better unimportant points. A.leave off B. focus on C.leave out D.concentrate on
My sister has friends at school.But she has good friends. A.few,a few B. a few,few C.little,a little D.a little,little
More than 30,000 drivers and front seat passengers are killed or seriously injured each year.At a speed of only 30 miles per hour it is the same as falling from a third-floor window.Wearing a seat belt saves lives;it reduces your chance of death or serious injury more than half. Therefore drivers or front seat passengers over 14 in most vehicles must wear a seat belt.If you do not,you could be fined up to&50.It will not be up to the drivers to make sure you wear your beht.But it will be the driver.s responsibility to make sure that children under 14 do not ride in the front unleas they are wearing a seat belt of some kind. However,you do not have to wear a seat belt if you are reversing your vehicle;or you are making a local delivery or collection using a special vehicle;or if you have a valid medical certificate which excuses you from wearing it.Make sure these circumstances apply to you before you decide not to wear your seat belt.Remember you may be taken to court for not doing so,and you may be fined if you cannot prove to the court that you have been excused from wearing it. 1.Wearing a seat belt in a vehicle A.reduces road accidents by more than half B.saves lives while driving at a speed up to 30 miles per hour C.reduces the death rate in traffic accidents D.saves more than 15,000 lives each year
-Was the housemaster strict? －Yes,he requested that we television on week nights. A.not watch B.must not to watch C.not be watching D.have not watched
Are the terms"pure"and"applied"two totally different activities,having litle or 0o interconnection,as often implied? A.is B.are C.that D.what
.Surely he won.t deny there on that occasion. A.to be B.having been C.to have been D.he be
She is always. others. A.so glad to help B.too glad not to help C.too glad to help D.glad enough not to help
He was in the accident and taken to hospital. A.knocked out B. knocked off C.knocked at D.knocked to
The weather being unfavorable,they had to the sports meet. A.put out B.put off C.put up D.put on
You our case very convincingly.The jurors were clearly impressed. A. represented B.presented C.promoted D.probed
The teacher asked us to write a in one hour. A.two-hundred-word composition B.two-hundred words composition C.two-hundreds-words composition D.two hundreds of words composition
.If he promises that he will spare no effort in promoting public welfare. A. elected B.elect C.electing D.being elected
the PLA men the villagers would not have survived the flood. A.It had not been for B. Had it not been for C.Were it not for D.Has it not been for
.If law and order not preserved,people will not be able to live a secure life. A.are B.were C.is D.was
There is not much time left for you to cover everything,you.d better unimportant points. A.leave off B. focus on C.leave out D.concentrate on
My sister has friends at school.But she has good friends. A.few,a few B. a few,few C.little,a little D.a little,little