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问题 单项选择题

下列关于抽样调查与普查的论述哪项是错误的（）。

A.抽样调查和普查都属于观察法

B.抽样调查最适用于变异程度大的人群

C.抽样调查覆盖面一般比普查广，而且节省人力、物力、财力

D.抽样调查与普查均不适用于调查患病率很低的疾病

E.普查不存在随机误差

答案

参考答案：B

填空题

During the 1980s, unemployment (失业人数) and underemployment (不充分就业) in some countries was so high as 90 per cent. Some countries did not 【B1】 enough food; basic needs in housing and clothing were not 【B2】 . Many of these countries looked 【B3】 the industrial processes of the developed nations for solution. 【B4】 , problems cannot always be solved by 【B5】 the industrialized nations. Industry in the developed nations is highly automated and very 【B6】 . It provides fewer jobs than labor-intensive industrial 【B7】 , and highly skilled workers are needed to 【B8】 and repair the equipment. These workers must be trained, 【B9】 many nations do not have the necessary training institutions. Thus, the 【B10】 of importing industry becomes higher. Students must be sent abroad to receive vocational and 【B11】 training. 【B12】 , just to begin training, the students must 【B13】 learn English, French, Germans, or Japanese. The students then spend many years abroad, and 【B14】 do not return home. All nations agree that science and technology should be shared. The point is: countries 【B15】 the industrial processes of the developed nations need to look carefully 【B16】 the costs, be cause ninny of these costs are 【B17】 Students from these nations should 【B18】 the problems of the industrialized countries closely. 【B19】 care, they will take home not the problems of science and technology, 【B20】 the benefits.

A．exposed

B．vague

C．uncovered

D．hidden
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单项选择题

下列条件语句中，功能与其他语句不同的是（ ）。

A．if(a）printf("%d\n",x); else printf("%d\n",y);

B．if(a==0）printf("%d\n",y); else printf("%d\n",x);

C．if (a!=0）printf("%d\n",x); else printf("%d\n",y);

D．if(a==0）printf("%d\n",x); else printf("%d\n",y);
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