What does Glaser say about the regrowth of rainforests？
A. They take centuries to regrow after being burnt．
B. They cannot recover unless the vegetation is burnt completely．
C. Their regrowth will be hampered by human habitation．
D. They can recover easily after slash-and-burn farming．
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Paragraph 1____________
A. Strong reactions
B. Anxiety about the future of cloning
C. The right to choose
D. What is cloning？
E. Arguments in favor of cloning
F. A common sight
From the passage it can be inferred that （）．
A. human activities will do grave damage to rainforests
B. Amazon rainforest soils used to be the richest in the world
C. farming is responsible for the destruction of the Amazon rainforests
D. there once existed an urban civilization in the Amazon rainforests
第 30 题
A. access
B. approach
C. admission
D. entrance
(三)下图为2008年上半年上海市分国别入境旅游外国人数的统计结果，根据图表内容回答17～20题。
图 2008年上半年上海市分国别入境旅游外国人数
A. 4倍 B．3倍 C．2倍 D．0．5倍
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