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这两题看不懂为什么选那些答案,希望牛人们帮我解答一下,谢谢了!
61. Investigators concluded that human failure was not responsible for the fatal airplane crash last August, and since that time new and more stringent rules for identifying and reporting mechanical problems have been in effect. That accounts for the fact that reports of airplane mechanical problems have increased in frequency by 50 percent since last August. (C) Which one of the following is an assumption underlying the argument in the passage? (A) Airplane travel is still relatively safe, despite the increase in reported mechanical problems. (B) Mechanical problems in airplanes have increased dramatically since last August. (C) Mechanical problems in airplanes have not increased by 50 percent since last August. (D) Airlines are less reluctant to report mechanical problems than they previously were. (E) Mechanical problems in airplanes have become easier to detect since last August.
75. Advertisers are often criticized for their unscrupulous manipulation of people’s tastes and wants. There is evidence, however, that some advertisers are motivated by moral as well as financial considerations. A particular publication decided to change its image from being a family newspaper to concentrating one sex and violence, thus appealing to a different readership. Some advertisers withdrew their advertisements from the publication, and this must have been because they morally disapproved of publishing salacious material. (C) Which one of the following, if true, would most strengthen the argument? (A) The advertisers switched their advertisements to other family newspapers. (B) Some advertisers switched from family newspapers to advertise in the changed publication. (C) The advertisers expected their product sales to increase if they stayed with the changed publication, but to decrease if they withdrew. (D) People who generally read family newspapers are not likely to buy newspapers that concentrate on sex and violence. (E) It was expected that the changed publication would appeal principally to those in a different income group. |