资产评估的客体是指( )。 A．中立的第三者 B．投资者 C．被评估的资产

采掘过程中从顶底板和煤层中混入的岩石叫（）。

A、分层煤样

B、夹石

C、矸石

D、煤泥

Brazil has become one of the developing world’s great successes at reducing population growth—but more by accident that design. While countries such as India have made joint efforts to reduce birth rates, Brazil has had better result without really trying, says George Martine at Harvard.

Brazil’s population growth rate has dropped from 2.99% a year between 1951 and 1960 to 1.93% a year between 1981 and 1990, and Brazilian women now have only 2.7 children on average. Martine says this figure may have fallen still further since 1990, an achievement that makes it the envy of many other Third World countries.

Martine puts it down to, among other things, soap operas (通俗电视连续剧) and instalment (分期付款) plans introduced in the 1970s. Both played an important, although indirect, role in lowering the birth rate. Brazil is one of the world’s biggest producers of soap operas. Globo, Brazil’s most popular television network, shows three hours of soaps six nights a week, while three others show at least one hour a night. Most soaps are based on wealthy characters living the high life in big cities.

"Although they have never really tried to work in a message towards the problems of reproduction, they describe middle and upper class values not many children, different attitudes towards sex, women working," says Martine. "They sent this image to all parts of Brazil and made people conscious of other patterns of behavior and other values, which were put into a very attractive package. "

Meanwhile, the instalment plans tried to encourage the poor to become consumers. "This led to an enormous change in consumption patterns and consumption was incompatible (不相容的) with unlimited reproduction. " says Martine.

Soap operas have helped in lowering Brazil’s birth rate because ().

A. they keep people sitting long hours watching TV

B. they have gradually changed people’s way of life

C. people are drawn to their attractive package

D. they popularize birth control measures

未经处理的海水严禁用于钢筋混凝土和预应力混凝土。

在各种不同的信息系统需求中，（）描述了用户使用产品必须要完成的任务，可以在用例模型中予以说明。

A.业务需求

B.功能需求

C.用户需求

D.非功能需求

在插拔单板时，下列说法正确的是：（）

A.在安装单板时，压上（下）扳手之前要保证扳手扣位没有顶住横梁。

B.在拔出单板时，在平拉单板之前要压上（下）扳手按键，确保扳手扣位退出横梁。

C.为了确保设备的正常运行，一定要把所有单板上的固定螺钉拧紧。

D.以上说法都正确