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【单选题】
少量H2O2与H2S反应的主要产物是 ( )A.
H2SO4
B.
H2SO3
C.
H2S2O3
D.
S
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举一反三
【简答题】聚丙烯的立体异构包括 、 和 。
【单选题】Not the teacher,but the students ____ looking forward to seeing the film.
A.
is
B.
are
C.
am
D.
be
【单选题】It's much easier to make friends ________ you have similar interests.
A.
unless
B.
when
C.
even though
D.
so that
【简答题】二极管的最大特点是( )
【简答题】阅读理解。 It's hard to make friends if you stay at home alone all the time. Be outgoing, get out of the house and do things with other people. It's easier to make friends when you follow these: Show peopl...
【简答题】阅读理解。 It's hard to make friends if you stay home alone all the time. Get out of the house and do things that will put you in touch with other People. It's easier to make friends when you have similar ...
【单选题】Not only the teacher, but also the students () looking forward to seeing the film.
A.
is
B.
are
【简答题】聚丙烯的立体异构包括 、 和 。
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