Questions 9-10
If a person chooses to walk rather than drive, there is one less vehicle emitting pollution into the air than there would be otherwise. Therefore if people would walk whenever it is feasible for them to do so, then pollution will be greatly reduced.
10. Which one of the following, if true, most strengthen the argument?
(A) If automobile passengers who never drive walk instead of ride, there will be fewer vehicles on the road as a result.
(B) Nonmoving running vehicles, on average, emit half as much pollution per second as moving vehicles, but the greater congestion is, the more nonmoving running vehicles there are.
(C) Since different vehicles can pollute at different rates, it is possible for one driver who walks to make a greater contribution to pollution prevention than another driver who walks.
(D) On average, buses pollute more than cars do, but buses usually carry more passengers than cars do.（B）
(E) Those who previously rode as passengers in a vehicle whose driver decides to walk instead of drive might themselves decide to drive.
Why choose B?It seems to me that it's totoally irrelevant!
Wait for NNs' instructions!
这题用排除法做吧，其他四个选项就更没有关系啦，这个是最佳答案
另外（当然是看着答案想的），你看，结论是如果可能的话人就走路，那么污染会大幅度减少。B选项讲的是在行驶中不动的汽车，平均来看，每秒排放出比运动中的汽车一半的污染，但是越是交通堵塞，就会有更多在行驶中不动的汽车。其实就是在讲，不管怎么着，只要你开车，动还是不动的时候都会有大量的污染，意思就是支持结论啊，走路多好，肯定没污染，呵呵，那污染就大幅度减少了
有道理，这样想也合情合理啊。
嗯，明白了！
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