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问题 单项选择题 A1/A2型题

属于支气管扩张特异性的临床表现为（）

A.心慌、气短、咳粉红色泡沫痰

B.慢性咳嗽，咳白色黏痰，痰中带血

C.慢性咳嗽，咳白色泡沫痰

D.X线胸片显示左下肺纹理紊乱，多个不规则环状透光区伴卷发状阴影

E.多于中年后发病

答案

参考答案：D

读图填空题

人类ABO血型系统有     型、     型、     型和AB型四种血型。输血时应以输入同型血为原则；健康成人一次献血      毫升不影响健康。
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单项选择题

Fewer than half of the jobs in the United States conform even loosely to the standard forty-hour, nine-to-five weekday schedule, according to demographic experts. This is largely due to the rapid increase in the number of service firms and in the proportion of the United States labor force these firms employ, the experts say.
Which of the following, if true, best helps to explain bow the growth of the service sector has had the effect noted above ？（）

A．In order to supplement their incomes, a small percentage of workers in other sectors of the economy take servicesector jobs as sell.

B．New service-sector firms have arisen to fill the need for day care for children, a need that was created by the increasing number of families in which both parents are employed.

C．More part-time than full-time jobs have been created through the application of new technologies to traditional occupations.

D．Manufacturing enterprises and other nonservice firms often operate twenty-four hours a day, seven days a week.

E．The largest and fastest-growing segment of the service sector caters to leisure activities pursued outside the standard nine-to-five weekday schedule.
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