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问题 选择题

如果铁丝的温度升高了，则（   ）

A．铁丝一定吸收了热量

B．铁丝一定放出了热量

C．外界可能对铁丝做功

D．外界一定对铁丝做功

答案

答案：C

做功和热传递对改变物体的内能是等效的，温度升高可能是做功，也可能是热传递。故C正确。

单项选择题

登高平台车（）是指平台车在安全工作范围内，回转中心到载人平台前沿的最大水平距离。

A.安全工作范围

B.额定工作高度

C.最大工作幅度

D.额定载荷
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单项选择题

Divorce is the act by which a valid marriage is dissolved, usually freeing the parties to remarry. In regions in (1) ancient (2) authority still predominates, divorce may be (3) and rare, especially when, as among Roman Catholics and Hindus, the religious (4) views marriage (5) indissoluble. Custom, (6) , may make divorce a simple matter in (7) societies. (8) some Pueblo Indian tribes a woman could divorce her husband (9) leaving his moccasins on the doorstep. The (10) of individual determination and mutual (11) are making divorce (12) acceptable in the (13) parts of the world.

Among premodern societies, the rate of marital stability is difficult to (14) (15) the varying definitions of (16) and divorce. It seems to be broadly true (17) wherever divorce is a legal impossibility the wedding is a well-defined event conducted with (18) formality. The (19) principle does not hold true: elaborate marriage ceremonial is quite compatible with high divorce rates. Many anthropologists agree that divorce is generally more permissible in matrilineal societies (20) in patrilineal ones, in which the procreative and sexual rights of the bride are often symbolically transferred to the husband with the payment of bride-price.

12（）

A.incredibly

B.increasingly

C.absolutely

D.dramatically
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