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【简答题】
对于反应A+2B=2R ,各物质反应速率之间的关系为 ( r A ) : ( r B ) : ( r R ) = ____________ 。(比例关系中的冒号使用英文状态下的符号)
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皮皮学刷刷变学霸
举一反三
【单选题】What Blackpool's beaches strike visitors most is their
A.
emptiness.
B.
cleanliness.
C.
modernity.
D.
monotony.
【单选题】—What's the time now? —It's _______ half past one. [ ]
A.
much
B.
about
C.
many
D.
at
【单选题】She is so strang. She always tries to ( )talking to me.
A.
prefer
B.
protect
C.
avoid
D.
assure
【简答题】（4）发生间接水击的条件是（式中Ta为阀门关闭时间，L为管道长度，C为水击波速。）（ ）
【单选题】What is the author's attitude towards the strike for higher wages?
A.
Neutral.
B.
Indifferent.
C.
Disagreeable.
D.
Critical.
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