近几十年来，国外（）的桥式起重机都采用箱形结构桥架。A.50%~60

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问题单项选择题

近几十年来，国外（）的桥式起重机都采用箱形结构桥架。

A.50%~60%

B.60%~80%

C.85%~90%

D.90%~95%

答案

参考答案：C

填空题

看一看，填一填。

This watermelon is _________, but that one is ___________.

This ruler is __________ than that ruler.

That ruler is __________ than this ruler.

Lingling's bag is _________ than Amy's.

Amy's bag is _________ than Lingling's.

单项选择题

“10±0.5”其尺寸范围是（）。

A、9.5～10

B、9.5～10.5

C、10～10.5

D、10