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【单选题】
下列符合热力学第二定律的是( )。A.
功量可以转换成热量，但热量不能转换成功量
B.
自发过程是不可逆的，但非自发过程是可逆的
C.
从任何具有一定温度的热源取热，进行热变功的循环
D.
孤立系统熵增大的过程必是不可逆过程
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反馈参考答案：
举一反三
【单选题】__________ he took part in the competition, he won a second prize.
A.
The first time
B.
For the first time
C.
At a time
D.
At one time
【简答题】听力原文：What do you do in the first part of the conversation? What do you do in the first part of the conversation? We ______ and tell each other our names.
【单选题】John always feels sluggish first thing in the morning. The underlined part means ______.(2014-70)
A.
sick
B.
inactive
C.
dizzy
D.
drowsy
【单选题】If you take part in the first competitive part of the tour, you will ride for ______.
A.
35 kilometers
B.
55 kilometers
C.
75 kilometers
D.
110 kilometers
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