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问题 单项选择题

以下关于APU的结构形式描述正确的是（）

A.一级离心式负载压气机，2级离心式发动机压气机，2级轴流式涡轮

B.一级离心式负载压气机，一级离心式发动机压气机，2级轴流式涡轮

C.无负载压气机，两级离心式发动机压气机，2级轴流式涡轮

D.一级离心式负载压气机，一级离心式发动机压气机，3级轴流式涡轮

答案

参考答案：B

单项选择题

火区启封必须具备的条件中火区内空气中不含由乙烯、乙炔、一氧化碳浓度在封闭期间内逐渐下降，并稳定在（）%以下。

A.0.5

B.0.0024

C.0.001
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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.

10（）

A.principles

B.principals

C.princes

D.privacies
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