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【判断题】
计时器的3U或4U功能，显示的速度值是滑块挡光片前段通过光电的瞬时速度。A.
正确
B.
错误
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【单选题】Jack is not very decisive, and he always finds himself in a ______ as if he doesn't know what he really wants to do.
A.
fantasy
B.
dilemma
C.
contradiction
D.
conflict
【简答题】What is the main goal of sending human missions to Mars? A) To find out if life ever existed there. B) To see if humans could survive there. C) To prove the feasibility of large-scale space ventures. ...
【简答题】Something must be done to pr factories sending out poisonous gases so as to keep the city _________. A polluting B. from polluting C. pollute D. from being polluted
【单选题】. I think immediate action should be ____to pr the facories sending out waster
A.
make
B.
brought
C.
taken
D.
paid
【简答题】________ sending out or giving off
【单选题】—Does Ted tell you if he next Sunday? —No, he doesn’t . But if he , I’ll give you a ring.
A.
will come, will come
B.
comes, will come
C.
comes, comes
D.
will come, comes
【简答题】研究对象是矩形,建立()更方便边界描述。
【单选题】The sun is shining in the sky and sending out ______ light and heat.
A.
a large number of
B.
a great many
C.
a large amount of
D.
a lot
【单选题】听力原文：M: I' ve lost the disc of John. W: If he finds out, he will really lose his temper. How will John react when he learns about what the man did?
A.
He'll become very angry.
B.
He'll tend to find it.
C.
He'll try to find it.
D.
He'll get another one.
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