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【单选题】
有H2和N2的混合气体50mL，加空气燃烧后，体积减小15mL，则H2在混合气体中的体积百分含量为()。A.
30%
B.
20%
C.
10%
D.
45%
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反馈参考答案：
举一反三
【简答题】下面程序的运行结果是在窗体中显示的： 运行后窗体上显示的是______。
【简答题】In this section there are four passages followed by questions or un finj3hed statements,each with four suggested answers marked[A], [B],[C] and [D]. Choose the one that you think is the best answer. M...
【单选题】-Was his father very strict with him when he was at school? -Yes．He hed never praised him()he became one of the topstudents in his grade．
A.
after
B.
unless
C.
until
D.
when
【简答题】/ hed/___
【单选题】下面程序的运行结果是（ ）。 #include classbase{ protected： inta； public： base（）{cout$amp;
A.
0123
B.
3120
C.
O312
D.
3012
【单选题】No sooner did he complete the job______he found hed made a disastrous mistake.
A.
when
B.
what
C.
than
D.
that
【单选题】下面程序的运行结果是( )。 include define_MYDEBUG void main() { ifdef_MYDEBUG printf('DEBUG')； else printf('RELEASE')； endif )
A.
DEBUG
B.
RELEASE
C.
DEBUGRELEASE
D.
程序有错误
【单选题】下面程序的运行结果是（ ）。 #include classbase{ protected： inta； public： base（）{cout$amp; derived（）{cout$amp;
A.
0123
B.
3120
C.
0312
D.
3012
【单选题】听力原文： If your boss asks you to work in Moscow this year, hed better offer you more money to do so — or even double that depending on where you live now. Thats because Moscow has just been found to be ...
A.
Tokyo.
B.
Hong Kong.
C.
Moscow.
D.
Sydney.
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