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托福阅读句子插入题:The Cambrian Explosion

2015-08-18 16:05:59来源:网络

  【托福阅读题型:The Cambrian Explosion句子插入题】托福阅读中句子插入题是重要题型之一。根据托福阅读题型不同来进行专项练习,是短期提高托福阅读能力的有效方法。同学们需要多加练习哦!

  查看全部:托福阅读题型分类练习之句子插入题

  托福阅读句子插入题:The Cambrian Explosion

  【Paragraph 3】One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft bodied and simply did not fossilize. ■Fossilization of soft-bodied animals is less likely than fossilization of hard-bodied animals, but it does occur. ■Conditions that promote fossilization of soft-bodied animals include very rapid covering by sediments that create an environment that discourages decomposition. ■In fact, fossil beds containing soft-bodied animals have been known for many years. ■(The Cambrian Explosion)

  Look at the four squares [■] that indicate where the following sentence could be added to the passage.It is relatively

  rare because the fossilization of soft-bodied animals requires a special environment.

  Where could the sentence best fit?

  答案见下一页:

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