[求助]a weaken problem

A worldwide ban on the production of certain ozone-destroying chemicals would provide only an illusion of protection.Quantities of such chemicals.already produced, exist as coolants in millions of refrigerators.When they reach the ozone layer in the atmosphere, their action cannot be halted. So there is no way to prevent these chemicals from damaging the ozone layer further.

Which of the following, if ture, most seriously weakens the argument above?

(A)I is impossible to measure with accuracy the quantity of ozone-destroying chemicals that exist as coolants in refrigerators.

(B)In modern societies, refrigeration of food is necessary to prevent ungealthy and potentially life-threatening conditions.

(C)Replacement chemicals that will not destroy ozone have not yet been developed and woul be more expensive than the chemicls now used as coolants in refrigerators.

(D)Even if people should gie up the use of refrigeration, the coolants already in existing refrigerators are a threat to atmospheric ozone.

(E)The coolants in refrigerators can be fully recovered at the end of the useful life of the refrigerators and reused.

E为什么是选E呢？如果氟利昂从利用的话，岂不是污染更大了？还是继续咋破坏臭氧层呀。。。好像我这样理解不对耶。。。

A worldwide ban on the production of certain ozone-destroying chemicals would provide only an illusion of protection.Quantities of such chemicals.already produced, exist as coolants in millions of refrigerators.When they reach the ozone layer in the atmosphere, their action cannot be halted. So there is no way to prevent these chemicals from damaging the ozone layer further.

思路：虽然世界对臭氧破坏的化学物质有禁令，但是这个东西也已经生产了几百万个冰箱。因为当这些化学物质升到大气层的臭氧层，那么这个破坏就不会被阻止，所以得出结论。以后没有办法阻止这些化学物质破坏臭氧层了。

要削弱，就是这些物质不会产生化学物质升到大气层，然后就不会破坏臭氧层，那么这个结论以后将无法控制就削弱。

答案必然是要跟文中推理过程的原因有关，会出现导致对空气破坏的一些原因词，例如化学物质，和那个化学物质在冰箱里作为什么C开头的词。以及出现关于可以控制C或者化学物质的标志就是正确的。所以可以立即排除A,B，和C，D和E有一个必然是加强和削弱（ETS的TRICKY），读出来就好了。

(A)I is impossible to measure with accuracy the quantity of ozone-destroying chemicals that exist as coolants in refrigerators.跟正确度无关

(B)In modern societies, refrigeration of food is necessary to prevent ungealthy and potentially life-threatening conditions.跟食物对人体的安全也无关。

(C)Replacement chemicals that will not destroy ozone have not yet been developed and woul be more expensive than the chemicls now used as coolants in refrigerators.有化学物质，但是是谈到费用问题，所以无关。

(D)Even if people should give up the use of refrigeration, the coolants already in existing refrigerators are a threat to atmospheric ozone.有C，但是仔细读句子。加强,承认这个确实对大气层造成不好的影响。

(E)The coolants in refrigerators can be fully recovered at the end of the useful life of the refrigerators and reused.确实可以被控制，RECOVER，不会继续产生新的量，另外可以被REUSE在升到空中之前。所以对生产大量冰箱会导致对大气层污染的推理就不存在了。所以答案选E。