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【单选题】
Generally speaking, when _____ according to the directions, the medicine had no side effect．A.
take
B.
taken
C.
to take
D.
to be taken
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【单选题】I think the telephone is the second _________ invention. [ ]
A.
helpful
B.
more helpful
C.
most helpful
D.
the most helpful
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A.
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B.
风对沙粒的搬运是以悬移和蠕移两种形式进行的。
C.
风沙地貌可分为风蚀地貌和风积地貌。
D.
当风力减弱或风沙流遇阻,风中挟带的沙粒沉降于地面,这种现象称为风积作用。
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A.
live together
B.
able to be relied on
C.
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D.
nervous
【单选题】In a foreign country, you should feel free to talk with people because __________.
A.
your English is almost perfect
B.
you need information
C.
people are friendly and helpfu l
D.
you need guidance
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