搜题请搜索小程序“爱下问搜题”
问题 单项选择题

密封圈无破损，切口应整齐平滑，不得出现锯齿状，锯齿直径大于（）为失爆。

A.1mm

B.2mm

C.3mm

D.5mm

答案

参考答案：A

选择题

—I must look after my mother at home. She gets a stomachache.

—______ Can I help you?

—That's very kind of you. But I can manage it myself.

[ ]

A. I'm sorry to hear that.

B. Bad luck.

C. It doesn't matter.

D. What a shame.
查看答案
单项选择题

我国现行城镇住房制度的核心不包括（）。

A.实现城镇住房的社会化和商品化

B.建立住房保障制度、改进完善住房供应体系

C.加强国家对城镇住房的管控力度

D.最终达到"人人享有适当的住房"的社会发展目标
查看答案