题目内容

加大管径是控制磨损腐蚀的方法之一。

A. 对
B. 错

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尽可能减少结构上的应力集中因素以防应力腐蚀。

A. 对
B. 错

为防止应力腐蚀,焊后应烘烤驱氢。

A. 对
B. 错

Watch the clip and choose the best answer to each of the questions you hear.Which of the following is NOT included in the customs observed at the festival?

Admire the beauty of chrysanthemums
B. To have a public holiday
C. Drink wine
D. Climb mountains

独立基础底板厚度通常为100mm。

A. 对
B. 错

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