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【多选题】
烟花爆竹行业生产安全事故频发的主要原因有（ ）。A.
非法生产现象严重
B.
企业不具备基本的安全条件
C.
安全管理制度不健全
D.
从业人员技术水平差
E.
烟火药配方中原料搭配不合理
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【单选题】The audience were _______the performance of Chinese athletes at the 21st Winter Olympics. [ ]
A.
impressed by
B.
impressed on
C.
interesting in
D.
expressed by
【单选题】I have been trying to advise them not to act that way, but my advice had no _________on them.
A.
impression
B.
advantage
C.
influence
D.
affect
【简答题】根据数理统计中的贝努利大数定律,当样本数n足够大时,样本的分布函数将近似地( )总体的分布函数,这就是利用样本推断总体的理论依据。
【单选题】The hard-working farmers and their happy life _____ we saw in the countryside made a wonderful impression on us.
A.
whom
B.
who
C.
which
D.
/
【单选题】—What a nice bike! Is it new?—No. I have _________ it for 2 years.
A.
had
B.
sold
C.
borrowed
D.
bought
【单选题】----What a nice bike! How long have you ______ it ? ----- For a week. I spent all my money on it.
A.
bought
B.
had
C.
taken
D.
kept
【单选题】----What a nice bike! How long ____ you ____it? ----- Just two weeks.
A.
have, bought
B.
did, buy
C.
have, had
D.
are, having
【单选题】The final document was supposed to mend the damage ______upon the world by the war.
A.
impressed
B.
compromised
C.
imposed
D.
condensed
【单选题】—Why do you suggest the West Lake? —I believe __beauty of ___ nature there will make__excellent impression upon you.
A.
the; /; the
B.
the; /; an
C.
a; the; an
D.
the; the; an
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