标题: 确实是没人解答。。。大全C16.要晕了。。。呼唤版主NN和大家! [打印本页] 作者: stucash 时间: 2010-2-9 10:27 标题: 确实是没人解答。。。大全C16.要晕了。。。呼唤版主NN和大家! In 1986, the city of Los Diablos had 20 days on which air pollution reached unhealthful amounts and a smog alert was put into effect. In early 1987, new air pollution control measures were enacted, but the city had smog alerts on 31 days that year and on 39 days the following year. In 1989, however, the number of smog alerts in Los Diablos dropped to sixteen. The main air pollutants in Los Diablos are ozone and carbon monoxide, and since 1986 the levels of both have been monitored by gas spectrography. Which of the following statements, assuming that each is true, would be LEAST helpful in explaining the air pollution levels in Los Diablos between 1986 and 1989? (A) The 1987 air pollution control measures enacted in Los Diablos were put into effect in November of 1988. (B) In December of 1988 a new and far more accurate gas spectrometer was invented. (C) In February of 1989, the Pollution Control Board of Los Diablos revised the scale used to determine the amount of air pollution considered unhealthful. (D) In 1988 the mayor of Los Diablos was found to have accepted large campaign donations from local industries and to have exempted those same industries from air pollution control measures.(B) (E) Excess ozone and carbon monoxide require a minimum of two years to break down naturally in the atmosphere above a given area. 我知道是least helpful, 找不支持的, 但我实在很困扰这个B选项是正确答案。解释1986-1989, 如果是这样, 那么其他选项也有嫌疑没有解释完整这段时间的变化.所以我感觉重点不再这上面.
所以,希望大家可以给我讲一下该题你们的思考过程.....谢谢了..
请大家帮忙...NN..版主....作者: 张大猴 时间: 2010-2-9 10:41
我不是牛啊 我的理解是,这道其实是解释题,解释文章中的paradox,题目的重心是 explaining the air pollution levels。 B中说发明出来了更准确的gas spectrography,但之前的gas spectrography是高估还是低估污染物的数字并不知道作者: yidiyuehan 时间: 2010-2-9 18:05
其实我倒是比较纠结于B & D 两项, 如果让我选我会选D,
B 只是说 一个新的被研发出来, 但是没有说几时投入使用, 所以不能解释论点矛盾. D 说了市长 把其中一些企业剔除了, 但是并没有说这些企业产生很多(ozone and carbon monoxide).作者: mycontrol01 时间: 2010-2-10 10:30
D的意思是市长收到很多来自大企业的捐款,因此他使这些工业企业不再受空气污染法案的限制. 隐含的意思就是自1988市长收到钱以后,空气污染程度更大了
至于A text中说In early 1987, new air pollution control measures were enacted 只是说new measures被制定出来了 还没说被实施 A说1988这个measure实施了 更好的控制了污染物的排放 所以smog alert的数字也下降了