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【单选题】
鞣质是一类结构复杂的( )A.
甾体化合物
B.
多元酚类化合物
C.
苷类化合物
D.
有机酸类化合物
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【简答题】Cohort effect
【单选题】Greenhouse Effect Ⅰ. Introduction Greenhouse Effect, the capacity of certain gases in the atmosphere to trap heat emitted from the Earth's surface, thereby insulating and warming the Earth. Without th...
A.
Y
B.
N
C.
NG
【简答题】additive effect
【单选题】Parents will surely their children.
A.
make no effect on
B.
have some effect on
C.
have no effect on
D.
make some effect on
【简答题】替代效应和收入效应(substitution effect and income effect)
【单选题】His talk had __________ me.
A.
a big effect to
B.
a deep effect on
C.
a deep effect for
D.
a deep affect on
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