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【单选题】
下列物质哪一个是单萜:A.
环烯醚萜
B.
青蒿素
C.
紫杉醇
D.
强心苷
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反馈参考答案：
举一反三
【简答题】通常情况下,企业常常( )地与大客户保持联系,而( )地为小客户提供服务。
【单选题】Bill is not a fast runner and he doesn't have a chance of winning the marathon, but he will _____ the race even if he finishes last.
A.
keep on
B.
keep to
C.
stick out
D.
stick to
【单选题】He didn't want to go to the cinema but they begged so hard that he ______ and went with them.
A.
gave off
B.
gave out
C.
gave in
D.
gave up
【单选题】Why does Jim say this?
A.
He doesn't permit her to work there.
B.
He didn't expect the woman was serious.
C.
He will not help her to work there.
D.
He can't agree with her mor
【简答题】驼峰色灯辅助信号机,可兼作( )或发车进路信号机,并根据需要装设进路表示器
【简答题】A．He thinks that-the speaker won't show up. B．He thinks the seminar won't be open to the public. C．He thinks that there won't be enough seats for everybody. D．He thinks that there might not be any mor...
【简答题】A．He likes to go with her. B．He has no time. C．He doesn't feel welt. D．He doesn't like the evening party.
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