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【简答题】
变长;使延长v. （）变长;使延长v. 1 _ _ _ _ _ _ _
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皮皮学刷刷变学霸
举一反三
【简答题】Are you going downtown this afternoon? I am going to have these letters mail . A B C D ____________
【单选题】下列关于阿司匹林的描述,不正确的是( )
A.
具有解热、镇痛、抗风湿作用
B.
其解热、镇痛、抗风湿作用与其抑制PG生物合成有关
C.
常见的不良反应有胃肠道反应和心律失常
D.
可抑制血小板聚集
E.
哮喘患者禁用
【单选题】下列说法中错误的是（ ） ①化学性质相似的有机物是同系物 ②分子组成相差一个或几个CH 2 原子团的有机物是同系物 ③若烃中碳、氢元素的质量百分比相同，它必定是同系物 ④分子中含有碳、氢元素的化合物是烃类．
A.
①②③④
B.
②③
C.
③④
D.
①②③
【单选题】Enquiry letters are often written _________ an advertisement that you have seen in the paper, magazine, or commercial on television.
A.
by means of
B.
at the cost of
C.
in response to
D.
in charge of
【单选题】I have four letters to write today and I have finished ______.
A.
three
B.
the three
C.
ones
D.
/
【单选题】You ______ all morning, but you ______ three letters!
A.
have been typing, have only done
B.
were typing, only did
C.
had been typing, have only done
D.
have typed, have only done
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