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发布时间:2023-12-13 04:44:13

[单项选择]Companies don' t want to spend money on research in developing appropriate crops in Africa because


A. existing technology fails to grow dry-land crops
B. only dozens of years later can they make profits
C. they are not encouraged and probably cannot make any profit
D. most of African countries belong to the third world

更多"Companies don' t want to spend mone"的相关试题:

[单项选择]Companies don't want to spend money on research in developing appropriate crops in Africa because ______.


A. existing technology fails to grow dry-land crops
B. only dozens of years later can they make profits
C. they are not encouraged and probably cannot make any profit
D. most of African countries belong to the third world
[单项选择]

B
Unless we spend money spotting and preventing asteroids now, one might crash into Earth and destroy life as we know, say some scientists.
Asteroids are different forms of the meteoroids that race across the night sky. Most orbits the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a violent coming course together with Earth.
Buy $ 50 million worth of new telescopes right now. Then spend $10 mil]ion 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’ll have 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 event is; and 2) How bad the consequences if the event occurs. Experts think asteroids big enough to destroy lots o
A. It sounds practical but it may not solve the problem.
B. Further research should be done before it is proved to be capable.
C. It may create more problems than it might solve.
D. It is a waste of money because a violent coming course of asteroids with the earth is very. unlikely.

[单项选择]I don't want to lend money to him; he is already in debt ______ me.
A. to
B. for
C. of
D. with
[单项选择]I don't want to borrow the money, so I prefer to manage ______.
A. to
B. with
C. for
D. without
[单项选择]I don't want to lend any money to him; he's already in debt ______ me.
A. to
B. for
C. of
D. with
[单项选择]I don't want much money. Fifteen dollars ______ enough.


A. were
B. are
C. is
D. have been

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