1. In Valgin, gasoline is sold in different grades, the most expensive being premium gasoline. Only about 10 percent of gasoline-powered vehicles sold in Valgin require premium gasoline, and for other vehicle premium provides no advantage. Nevertheless, nearly 15% of gasoline sold there is premium. So presumably a number of Valgian drivers are wasting money when they buy gasoline.
Which of the following, if true, most strengthens the argument?
A Buyers of vehicles that require premium gasoline do not drive substantially more miles per year than other drivers.
B More of the intermediates grade of gasoline is sold than of premium gasoline.
C Most of the vehicles that require premium gasoline are high-performance vehicles and are relatively expensive.
D Premium gasoline costs almost 25 percent more than least expensive grade of gasoline.
E Some very old vehicles that did not require premium gasoline when they were new now do require it to run smoothly.
2. Scientist: A greenhouse gas, for example, carbon dioxide, forms a transparent layer that traps solar heat beneath it in the earth’s atmosphere. Atmospheric levels of carbon dioxide are currently increasing, causing the climate to warm—an effect that is predicted by at least one computer model of the greenhouse effect. But the warming that has occurred is a great deal less than what would be expected based on the model. Therefore, _______.
Which of the following most logically completes the scientist’s argument?
A. better measurements of atmospheric levels of carbon dioxide are needed
B. the definition of “greenhouse gas” should probably be reconsidered
C. there are factors besides the increase in greenhouse-gas emissions contributing to the warming of the climate
D. the computer model of the greenhouse effect must be incorrect in some respect
E. the likely consequences of any warming of the climate are unlikely to be much less damaging than predicted
参考答案：
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2 其他factors与变暖是否符合预期无关作者: 大月亮cyn 时间: 2021-10-11 11:50 Day55 1. [Strengthen] E ❌ A
在V这个地方gasoline有很多等级，最贵的premium，只有10%的车需要PG，PG对其他车没什么好处，然而15%G卖，所以很多司机正在浪费钱 问加强
！！！问的是加强，E是削弱！！！！！
A. 需要PG的司机行驶路程不必其他司机多，如果开的多油量用的多合理削弱，反之增强
E. 一些旧的车现在需要PG，所以卖的多没有浪费钱 削弱 2. [Conclusion] D
warming < what would be expected based on the model --> D Model x作者: lfengi 时间: 2021-10-31 20:58
D --> A
10% 的车用了15%的油， 然而需要用premium油的车开的公里数却并没有其他车多， 因此加强了很多人在浪费钱的结论
D