辅酶ASH和乙酰氯反应，可以制备重要的生物化学中间体乙酰辅酶A。该反应为二级反应，两个反应物的起始浓度都是1
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A.directionB.introductionC.decisionD.education
A. direction
B. introduction
C. decision
D. education
Those who are likely to doubt their parents’values and ways of doing things are proba-bly__________ ．
A. the Japanese
B. the Americans
C. both the Japanese and the Americans
D. neither the Japanese nor the Americans
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A. hear of
B. attend
C. hear from
D. listen
Students should__________certain standards of behaviors．
A. live up to
B. live in
C. live on
D. live through
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