正确答案:

题目：车床主轴的径向跳动不会影响车削轴类零件的圆度误差。

解析：√

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举一反三的答案和解析：

[多选题]根据我国现行宪法的规定，国家对非公有制经济发展的指导方针是（）。

鼓励

支持

引导

解析：ABC

[单选题]By saying “Middle children are invisible” in paragraph 3, Lewis means that middle children 。

get the least attention from the family

解析：文章第三段提到 Lewis found that in families with three or four children, dinner conversation is likely to center on the oldest child, who has the most to talk about, and the youngest, who needs the most attention. 可以看出老大和老小都是谈话的焦点，只有中间的孩子是被人忽视的。

[单选题]What is the most appropriate title for the passage?

Earthquake Prediction and Control.

解析：答案：C