According to Craig Moritz of the University of California，the ranges of some animals living at higher altitudes have become smaller and smaller，while low­altitude animals have expanded their reaches.Earlier this year，Jonathan Lenoir and his team of researchers studied 171 forest species in Western Europe and showed that many are moving higher.It was the first time that research had shown the“fingerprints of climate change”in the distribution of plants by altitude.

　　41．What does the underlined word“decline”in Paragraph 2 mean?

　　A．Spread.

　　B．Change.

　　C．Illness.

　　D．Decrease.

　　【解析】　词义猜测题。从划线部分的后面“...53 percent of lowland tropical species to die out”可知变暖的天气会导致很多热带物种灭绝，所以decline的意思和decrease(减少)的相近。

　　【答案】　D

　　42．What can we learn from Paragraph 4?

　　A．Colwell drew many pictures as part of his research.

　　B．Experts think the figures the study provides are exact.

　　C．Little is known about species' sensitivity to climate change.

　　D．The researchers haven't considered the dangers tropical species may face.

　　【解析】　细节理解题。从第四段“...but the numbers they've found are likely to be doubtful because of the lack of knowledge of how sensitive species are to climate change.”可知人类对物种对气候变化的敏感性还知之甚少，故C项正确。

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