每年定期检查一次主梁的（）和（），超过技术规定时应立即修复。_爱下问搜题

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问题填空题

每年定期检查一次主梁的（）和（），超过技术规定时应立即修复。

答案

参考答案：拱度；挠度

补全对话，情景问答

从方框中选择最佳选项完成对话，有两项多余。

A. She can play the piano and she can sing very well.
B. What's her job?
C. Can he ride a bike?
D. Is this your sister?
E.  He's a doctor in a hospital.
F.  Where is she from?
G.  What's her name?

A:  Mary,  please look at the photo.      1
B:  No,  she is my friend.
A:       2
B:  Liz Black.  She likes music.    3
A:  Who's the man?  Is he her father?
B:  Yes.      4       He can speak English.
A:  Is the woman her mother?
B:  Yes,  she is.
A:       5
B:  She is a hotel manager.

判断题

在钙、镁混合液中测定钙离子时，调节pH值的范围是相当重要的一环。