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【单选题】
PCl 5 的分解反应 PCl 5 ( g )= PCl 3 ( g ) +Cl 2 ( g ) ,在一定温度下达到平衡 后 , 在该密闭容器中加入 N 2 ,该反应A.
平衡右移
B.
左移
C.
平衡常数不变
D.
平衡常数减小
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【单选题】听力原文： Is it possible to persuade mankind to live without war? War is an ancient institution which has existed for at least six thousand years. It was always bad and usually foolish, [32] but in the pa...
A.
Worse than in the past.
B.
As bad as in the past.
C.
Not so dangerous as in the past.
D.
As necessary as in the past.
【简答题】中央型肺癌的支气管阻塞或狭窄可引起肺的继发性改变包括 ————、————和————
【单选题】Most eduction institutions in the UK provides ________ courses and more specific vocational or applied subjects.
A.
literature
B.
human education
C.
math education
D.
general education
【多选题】The main categories of American higher eduction institutions are ( ).
A.
the universities
B.
the 4-year undergraduate institution
C.
the the 2-year community college
D.
the technical training institution
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