求助ＣＸＤ－假设６１，６２题

这两题看了后面的解释，但还不是很理解．想请教高人如何理解和选择的

６１．When permits for the discharge of chemicals into a waterway are issued, they are issued in terms of the number of pounds of each chemical that can be discharged into the waterway per day. These figures, calculated separately for each chemical for which a permit is issued, are based on an estimate of the effect of the dilutio of the chemical by the amount of water flowing throught the waterway. The waterway is therefore protected against being adversely affected by chemicals discharged under the permits.

The argument deponds on the assumption that

A)relatively harmless chemicals  do not interact with each other in the water to form harmful compounds 我一开始就把这个选项删了觉得是无关词

B)there is a swift flow of water in the waterway that ensures rapid dispersion of chemicals discharged

C)there are no chemicals for which discharge into waterway is entirely prohibited

D)those who receive the permits do not always discharge the entire quantity of chemicals that the permits allow.

E) the danger of chemical pollution of waterways is to be evaluated interms of human health only and not  in terms of the health of both human beings and wildlife.

i chose C and selected by thinking others are irrelavant. C may not the best, but i still can't understand why A should be the answer.

62. Claim: Country X's government lowered tariff barriers because doing so served theinterestes of powerful foreign companies.

Principle: In order for a change to be explained by the advantage some person or grou gained from it, it must be shown how the interests of the person or grop payed a role in bringing about the change.

Which one of the following, if true, can most logically serve as a premise for an argument that uses the principle to counter the claim?

A) Foreign companies did benefit when Country X lowered tariff brriers, but consumers in Country X benefited just as much.

B)In the period since tariff barriers were lowered, rice competition among importers has severely limited importers' profits from seeling froeign companies ' products in Country X

C) It was impossible to predict how Country X's economic reforms, which included lowering tariff barriers, would affect the economy in the short term

D)Many of the foreign companies that benefited from Counry X's lowering tariff barriers compete fiercely among themselves both in Contry X and in other markets

E) Although foreign companies benefited when Country X lowered tariff barriers, there is no other evidence thant these foreign companies induced the change.

这题是要否定ＣＬＡＩＭ，所以原则上说不属于假设题．我自己选的Ｂ，因为我觉得这题应该是有削弱的意思．用Ｅ更多也可以解释，但还是觉得Ｅ不是最合适的答案

唉，做逻辑最头痛了，真的也是怎一个＂错＂字了得．速度上去正确率不上去．４月份就考了

谢谢LS的解释,非常感谢