抗帕金森病的拟多巴胺药物有
A. 左旋多巴
B. 卡比多巴
C. 金刚烷胺
D. 溴隐亭
E. 苯海索
The decision had taken about 10 seconds ________________ read a market research study.
A. once he'd
B. once he's
C. once he'll
D. once he'd better
___________ understand this rule, you will have on further difficulty.
A. Once you will
B. Once you had
C. Once you would
D. Once you
Once you __________ to do something, you should do it well.
A. has decided
B. have decided
C. have been decided
D. decided
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