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问题 多项选择题

移动台精确的功率控制至关重要，因为通过精确的功率控制，我们可以得到以下好处，他们分别是（）.；

A.增加系统前向容量

B.增加系统反向容量

C.延长MS电池使用寿命

D.减少对其他手机的干扰

答案

参考答案：B, C, D

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．Frequently

B．Gradually

C．Presumably

D．Eventually
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多项选择题

种植义齿修复中，金属支架的作用是（）。

A.增加上部结构的强度

B.固位

C.分散力

D.连接

E.以上均是
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