氧气－氧化亚氮比例控制装置是目前常用的麻醉机安全保护装置，标准规定的O2浓度不能低于

水是一种溶解能力较强的溶剂。水在自然界循环过程中会混入各种各样的杂质，这些杂质，尤其是生活和生产污水中所含的杂质进入天然水体都会引起各种污染，甚至改变天然水体原有的物质平衡状态。破坏人类周围的自然环境，给人类社会的生活和生产带来极其恶劣的影响。

用混凝沉淀法除氟时，投入( )使氟化物产生沉淀。

A．硫酸铝

B．氧化铝

C．碱式氟化铝

D．磷酸三钙

E．碳酸钙

在残疾适应理论连续过程中的理论（）

A.心理理论

B.情感理论

C.整合理论

D.行为理论

E.危机理论

法国启蒙思想家孟德斯鸠曾说“要防止滥用权力，就必须用权力来约束权力，形成一种能联合各种权力的政制，其中各种权力既调节配合，又相互制约，即权力要分开掌握和使用。”最早将这一思想付诸实践的法律文件是[ ]

A、美国的1787年宪法

B、英国的《权利法案》

C、《 * * 宣言》

D、《拿破仑法典》

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

发电机出现什么情况应立即停运？