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【单选题】
Which of the following statements is true?A.
The subjects in a cross-sectional research are not of the same age group.
B.
The methods of study in longitudinal research will not change over time.
C.
Longitudinal research is reliable only in seeking understandings of the effects of early experiences on later development.
D.
Cross-sectional methods are not usually adopted in studying, for example, the changes in intelligence over a thirty-year period.
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举一反三
【单选题】If something seldom happens, it:
A.
happens every day
B.
happen occasionally
C.
happens on purpose
【单选题】If something seldom happens, it
A.
happens every day
B.
does not happen often
C.
happens on purpose
【单选题】If anything _____ the computer, please let me know. [ ]
A.
happens on
B.
happens to
C.
happens to
D.
happened to
【单选题】______________ the day before yesterday. [ ]
A.
something happens to him
B.
He happens to something
C.
Something happened to him
【单选题】'It happens that he was in business. ' The sentence means that______.
A.
He happens to be on business
B.
He happened to be on business
C.
He happens to have been on business
D.
He happened to being on business
【单选题】If anything __________the machine, please let us know. [ ]
A.
happens on
B.
happens to
C.
happened on
D.
happen to
【多选题】关于五味，下列哪是正确的
A.
药味可以与滋味相同，也可以与滋味相异
B.
是药物作用规律的高度概括
C.
是所有药物真实滋味的具体表示
D.
指药物因功效不同而具辛甘酸苦咸等味
E.
药味既是药物的滋味，又超出药物的滋味
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