According to the passage, which of the following is important in explaining a muscle movement？
A. The flow of blood to the muscles.
B. Classical conditioning.
C. Protein interaction.
D. The entry of unpleasant stimuli through the cell membrane.
查看答案
A．soB．howeverC．butD．or
A. so
B. however
C. but
D. or
A．workB．houseworkC．dutyD．business
A. work
B. housework
C. duty
D. business
John's father thought most children went to school by taxi.
A. Right.
B. Wrong.
C. Doesn't Say.
By calling Americans marrying people the author means that______.
Americans are more traditional than Europeans
B. Americans expect more out of marriage than Europeans
C. there are more married couples in USA than in Europe
D. more of Americans, as compared with Europeans, prefer marriage and they accept it at a younger age
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