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【单选题】
产品类型分为功能性产品和革新性产品,其中下列不属于 革新性产品特征是:( )A.
高边际利润
B.
市场竞争激烈
C.
产品寿命周期较短短
D.
需求不稳定
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【简答题】治疗手术后腹气胀和尿潴留最好选用 。
【单选题】It was not until she got home _______ Jenniferr
A.
9. It was not until she got home _______ Jenniferrealized she had lost her keys. ( 全国 3) A. when
B.
that
C.
where
D.
before
【单选题】It was reported another person was infected with bird flu.
A.
what
B.
which
C.
when
D.
that
【简答题】听对话，完成第l-3小题。 1. How was the girl's school trip? A. It was borin9. B. It was great. C. It was terrible .2. Were there any lions in the zoo? A. N0,there weren't. B. Yes,there were. C. We don't know. 3....
【简答题】简述钻井液的主要作用？
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