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【单选题】
下列说法正确的是(  )
A.
凡是放热反应都是自发的,因为吸热反应都是非自发的
B.
熵增加的放热反应一定能自发进行
C.
自发反应一定是熵增大,非自发反应一定是熵减小或不变
D.
自发反应在任何条件下都能实现
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A.
关键期
B.
敏感期
C.
最佳期
D.
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A.
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B.
Tom isn’t in right now.
C.
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D.
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E.
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A.
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B.
He refuses to apply for jobs with low salaries.
C.
It isn’t easy to get a job in the current financial climate.
D.
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【单选题】有个孩子听到妈妈说"你是好孩子。"他说"不,我是坏孩子。"这说明这个孩子处于( )。
A.
关键期
B.
敏感期
C.
最佳期
D.
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A.
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B.
第二象限
C.
第四象限
D.
第三象限
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A.
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B.
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A.
how many
B.
what
C.
which
D.
Whether
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