单选题：According to the explanation given in the passage, which of

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题目内容：
According to the explanation given in the passage, which of the following causes superbubbles to gradually assume the shape of a chimney?

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答案解析：

Questions 1—8·Look at the statements below and at the five e

Questions 1—8·Look at the statements below and at the five extracts from an arti

分类：GRE  题型：单选题
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There is no doubt__________Herbert is the most industrious s

There is no doubt__________Herbert is the most industrious student in our class.

分类：GRE  题型：单选题
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回答听力第22题：_________。

回答听力第22题：_________。

分类：GRE  题型：单选题
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语言要素的变化，有时并非等待社会生活的变革而变化—也就是说，即使社会生活没有发生显著变动，语汇、语音和语法也可能悄悄地起

语言要素的变化，有时并非等待社会生活的变革而变化—也就是说，即使社会生活没有发生显著变动，语汇、语音和语法也可能悄悄地起变化，语汇的变化比较显而易见，语法的变化

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Initially__________ expectation, Stella was dismayed to lear

Initially__________ expectation, Stella was dismayed to learn that her new dutie

分类：GRE  题型：单选题
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