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【单选题】
让乒乓球静止不动,而让手电筒绕着乒乓球转动,并让手电筒的光始终对着乒乓球,这所依据的假说是( )。A.
太阳不动，地球自转
B.
太阳不动，地球公转
C.
地球不动，太阳公转
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【简答题】The common cold is the world's most widespread illness, which is a serious infection that man receives. The most widespread mistake of all is that colds are caused by cold. They are not. They are caus...
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A.
the better received
B.
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D.
the best received
【单选题】If a friend offers me cigarettes at a party, I would rather ______ than ______. [ ]
A.
refuse; receive
B.
to refuse; to receive
C.
refuse; to receive
D.
to refuse; receiving
【单选题】He ______ an expensive gift on his birthday, but he didn't ______ it. ( )
A.
accepted…received
B.
receive…accept
C.
received…accept
D.
got…receive
【简答题】某生产者面临的需求曲线向右下方倾斜,问生产者是否应该将产量水平推进到缺乏弹性的区间?
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