单项选择题

承受冲击及振动荷载的结构不允许用
A、冷拉钢筋
B、热轧钢筋
C、热处理钢筋
D、以上都可以用

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单项选择题

‌Because export subsidies tend to result in domestic exporters charging lower prices on their goods sold overseas, the home country's: ______________.

A．Terms of trade will improve
B．Terms of trade will worsen
C．Export revenues will decrease
D．Export revenues will rise

单项选择题

排气支管应尽可能长，且各缸支管应相互独立、长度相等。

A．对
B．错