单选题：It is indicated that materials stronger than natural silk ca

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题目内容：
It is indicated that materials stronger than natural silk can be expected in the furore. A．Right
B．Wrong
C．Not mentioned
参考答案：
答案解析：

Silk's strength comes from its weak hydrogen bonds working t

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Three world-class tennis players came to contend for this ti

Three world-class tennis players came to contend for this title.A．argue B．claim

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The rules are too rigid to allow for human error.A．general B．complex C．inflexibl

分类：理工类  题型：单选题
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