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题库 / Prep2007E1-CR-67
A drug that is highly effective in treating many types of infection can, at present, be obtained only from the bark of the ibora, a tree that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug. It follows, therefore, that continued production of the drug must inevitably lead to the ibora's extinction.
Which of the following, if true, most seriously weakens the argument above?
The drug made from ibora bark is dispensed to doctors from a central authority.
The drug made from ibora bark is expensive to produce.
The leaves of the ibora are used in a number of medical products.
The ibora can be propagated from cuttings and grown under cultivation.
The ibora generally grows in largely inaccessible places.
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that is quite rare in the wild. It takes the bark of 5,000 trees to make one kilogram of the drug.
只说 单位用量大，且野外稀少，但是不知道总的供给量（除了野外的）有多少，够不够大
E.讨论的问题是会不会灭绝～会不会用的完，和种植在哪里,能不能获取无关
Largely代表很难活的，并不是完全不可获得
largely inaccessible VS inaccessible的区别，加了largely反而更错
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