C. The marula tree and the mango belong to different families.

　　D. There are several connections between Elephants and the marula fruit.

　　59 . What does the underlined word “this” in the last paragraph probably refer to ?

　　A. Elephants getting drunk.

　　B. Marula fruit fermenting in elephants’ stomachs.

　　C. Elephants eating rotten marula fruit.

　　D. Elephants eating marula trees directly.

　　57.【答案】D

　　【解析】根据本段中“Food takes between 12 and 46 hours to pass through an elephant’s digestive system, the authors point out, which is not enough for the fruit to ferment. ”可知答案。

　　【考点定位】考查推理判断能力。

　　58.【答案】B

　　【解析】根据第四段中“The first mistake of the drunken-elephant theory is that it’s unlikely that an elephant would eat the fruit if it were rotten, ” Morris says. “Elephants eat the fruit right off the tree, not when it’s rotten on the ground”一句可知。

　　【考点定位】考查细节理解。

　　59.【答案】B

　　【解析】“Supposing that this happened, it’s still highly improbable that the food would produce enough alcohol to make an elephant drunk.”这句话的意思是假设这种果实在大象体内能发酵，那它产生的乙醇也不足以使大象醉倒。

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