题目内容

3.“理想气体和单一热源接触作等温膨胀时,吸收的热量全部用来对外作功.”对此说法,有以下几种评论,哪种是正确的?

A. 不违反热力学第一定律,但违反热力学第二定律.
B. 不违反热力学第二定律,但违反热力学第一定律.
C. 不违反热力学第一定律,也不违反热力学第二定律.
D. 违反热力学第一定律,也违反热力学第二定律.

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4.下列过程,是可逆的有:

A. 活塞无摩擦地缓慢压缩绝热容器中的理想气体
B. 缓慢旋转的叶片使绝热容器中的水温上升
C. 冰溶解为水
D. 一个受阻力的单摆的摆动。

Britain is separated from the rest of Europe by the English Channel in the ____ ___ and the North Sea in the east.

A. east
B. south north

The Tories were the forerunners 0f ____ ___ , which still bears the nickname today.

A. the Labour Party
B. the Liberal Party
C. the Social Democratic Party
D. the Conservative Party

In Britain only ___ ____ of the population are farmers but they manage 7O% of the land area.

A. 2%
B. 3%
C. 4%
D. 5%

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