大家帮帮我啊，请教大全中的两个题目！

1. The burden of maintaining the U.S. highway system falls disproportionately on the trucking industry. Trucks represent only about 10 percent of the vehicles on U.S. roads. Yet road use taxes assessed on trucks amount to almost half the taxes paid for highway upkeep and repair.
Which of the following, if true, would most weaken the argument above?
(A) The trucking industry has enjoyed record after-tax profits in three of the past four years.
(B) Because of their weight, trucks cause over 50 percent of the damage sustained by highway surfaces each year.
(C) Without an economically viable trucking industry, the cost of goods in the United States would rise significantly.
(D) Road use taxes paid by trucking companies have decreased by 3 percent over the past five years.
为什么选B，我似乎不太明白其中的逻辑关系

2. In the effort to fire a Civil Service employee, his or her manager may have to spend up to $100,000 of tax money. Since Civil Service employees know how hard it is to fire them, they tend to loaf. This explains in large part why the government is so inefficient.
It can be properly inferred on the basis of the statements above that the author believes which of the following?
I.  Too much job security can have a negative influence on workers.
II.  More government workers should be fired.
III. Most government workers are Civil Service employees.
(A) I only
(B) I and III only
(C) II only
(D) I, II, and III
(E) III only
答案选A,但是我觉得III也是需要的啊，如果不知道Most government workers 是Civil Service employees，怎么可能从Civil Service employees具体指到government的效率呢

谢谢NN们指教啊

1.结论是，负担不乘比例  理由是，trucks只占10%，却要交50%得修理费。意思是费用负担应该和车的数量有关

B，truckes 重，造成了很多的damage，提出，费用应该和造成的damage有关，所以weaken

2.我不太清楚，只是觉得，most这个概念比较模糊，不一定能infer出这个结论吧

也许，30%就能造成inefficient，这个并不成推出most of

请指正~

赞成，2题题干只能得到Civil Service employees偷懒造成inefficient,既没有具体多少比例的人偷懒会造成inefficient，也没有提到goverment workers的概念，所以不能随便增加III这样的推论

谢谢楼上两位的回答，

第一题我理解了。

关于第二题，我觉得是不是这样，从题干中作者已经推出goverment is ineffieint，所以能够infer出作者认为part of the government works are Civil Service employees，也就是说把most 改成 part of 就对了？

谢谢

不太清楚哈

只是觉得part of the government works are Civil Service employees这个是事实,不用infer吧

瞎猜的