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【单选题】
在一定范围内,某化学反应的Δ r H m 与温度无关,那么该反应的Δ r S m 随温度的升高而( )。A.
升高
B.
降低
C.
不变
D.
可能升高也可能降低
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皮皮学刷刷变学霸
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【单选题】【单选】国际及我国都规定:船舶油舱柜的油气浓度在爆炸下限的 或以下时,才能进行热工作业,在爆炸下限 的或以下时,才能进入某些区域。
A.
1%/ 3%
B.
3%/ 5%
C.
1%/5%
【单选题】--- Will you please spare me a few minutes now? --- ___, but I’ll be free in half an hour.
A.
No, I can’t
B.
Yes, with pleasure
C.
No problem
D.
I’m afraid not
【单选题】听力原文：M: There are just one or two more things, Catherine. W: Do call me Cathy. M: OK, Cathy. Are you really interested in being a vet? W: Not really. Anyway, I'm not bright enough. I'm reasonably inte...
A.
ballet.
B.
Swimming.
C.
Nursing.
D.
Teaching
【单选题】听力原文：M: There are just one or two more things, Catherine. W: Do call me Cathy. M: OK, Cathy. Are you really interested in being a vet? W: Not really. Anyway, I'm not bright enough. I'm reasonably inte...
A.
ballet.
B.
Swimming.
C.
Nursing.
D.
Teaching
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