单选题：We set up experiments to test our ideas about_______

题目内容：

We set up experiments to test our ideas about_______ A．the icebox
B．the ice
C．scientific answers
D．the experiment
E．the world
F．water

参考答案：

答案解析：

There is a growing gap between the richand the poor.

There is a growing gap between the richand the poor.A．conflict B．tension C．gulf

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The writer introduces each category in the passage byA．defining it B．giving an e

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请在第__(47)__处填上正确答案。A．feel comfortable about changing our social habits B．what ha

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请在第__(58)__处填上正确答案。A．knocked B．beaten C．slapped D．affected

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