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1. 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? (A) The drug made from ibora bark is dispensed to doctors from a central authority. (B) The drug made from ibora bark is expensive to produce. (C) The leaves of the ibora are used in a number of medical products. (D) The ibora can be propagated from cuttings and grown under cultivation.（E） (E) The ibora generally grows in largely inaccessible places.
I think the key is C 15. Excavation of the ancient city of Kourion on the island of Cyprus revealed a pattern of debris and collapsed buildings typical of towns devastated by earthquakes. Archaeologists have hypothesized that the destruction was due to a major earthquake known to have occurred near the island in A.D. 365. Which of the following, if true, most strongly supports the archaeologists’ hypothesis? (A) Bronze ceremonial drinking vessels that are often found in graves dating from years preceding and following A.D. 365 were also found in several graves near Kourion. (B) No coins minted after A.D. 365 were found in Kourion, but coins minted before that year were found in abundance. (C) Most modern histories of Cyprus mention that an earthquake occurred near the island in A.D. 365. (D) Several small statues carved in styles current in Cyprus in the century between A.D. 300 and 400 were found in Kourion.（B） (E) Stone inscriptions in a form of the Greek alphabet that was definitely used in Cyprus after A.D. 365 were found in Kourion. I think C is better. | 
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发表于 2006-8-16 08:18:00
