问题 单项选择题

最近,通勤客机坠落的事故急剧增加在很大程度上是由飞行员缺乏经验所致。作为一个主要增长的工业部门,通勤客机最近对有经验的飞机驾驶员的需求量剧增。然而对飞机驾驶员的经验进行确定及评估是不可能的。例如,一个在气候良好的亚利桑那州飞行1000小时的教官,是不能和一个在充满暴风雨的东北部飞行1000小时的夜班货机飞行员相比的。
作者关于通勤客机坠毁事故的增加是由飞行员缺乏经验所致的结论最能被以下哪项事实所削弱

A.不可能衡量飞行员的经验并不表示缺乏经验。
B.使用一个与所阐明的观点在逻辑上不相关的例子。
C.对往返航空公司飞机坠毁事件的增加,只给出了片面的解释。
D.对飞行教官的经验与夜班货机飞行员的经验做了一个不公平的比较。
E.没有指明最近有多少往返航空公司的飞机的坠毁是由飞行员缺乏经验所致。

答案

参考答案:A

解析:题干结论是“通勤客机坠落的事故急剧增加在很大程度上是由飞行员缺乏经验所致”,给出的论据却是“对飞机驾驶员的经验进行确定及评估是不可能的”,显然论据和结论之间的联系是论证的有疑问的假设条件。

单项选择题
单项选择题

Most people would be (1) by the high quality of medicine (2) to most Americans. There is a lot of specialization, a great deal of (3) to the individual, a (4) amount of advanced technical equipment, and (5) effort not to make mistakes because of the financial risk which doctors and hospitals must (6) in the courts if they (7) things badly.

But the Americans are in a mess. The problem is the way in (8) health care is organized and (9) . (10) to pubic belief it is not just a free competition system. The private system has been joined a large public system, because private care was simply not (11) the less fortunate and the elderly.

But even with this huge public part of the system, (12) this year will eat up 84.5 billion dollars—more than 10 percent of the U. S. Budget—large number of Americans are left (13) . These include about half the 11 million unemployed and those who fail to meet the strict limits (14) income fixed by a government trying to make savings where it can.

The basic problem, however, is that there is no central control (15) the health system. There is no (16) to what doctors and hospitals charge for their services, other than what the public is able to pay. The number of doctors has shot up and prices have climbed. When faced with toothache, a sick child, or a heart attack, all the unfortunate persons concerned can do is (17) up. Two thirds of the population (18) covered by medical insurance. Doctors charge as much as they want (19) that the insurance company will pay the bill.

The rising cost of medicine in the U. S. A. is among the most worrying problems facing the country. In 1981 the country’s health bill climbed 15.9 percent--about twice as fast as prices (20) general.

5()

A.intensive

B.absorbed

C.intense

D.concentrated