单项选择题

注塑模具合理的碰穿角度是（）

A、>=0.5°
B、>=1°
C、>=3°
D、>=7°

<上一题目录下一题>

热门试题

单项选择题

以下不属于常用的内饰塑料件焊接工艺的是：（）

A、超声波焊接
B、钎焊
C、红外焊
D、振动摩擦焊

单项选择题

I’m over 21 years of age. I am a citizen of theUnited States. I have not been convicted of felony. And I have not been treated or confined for drug addiction, drunkenness, or mental illness. According to the National Firearms Act of 1934, I thus qualify to purchase a fully automatic machine gun capable of firing hundreds of bullets with a single squeeze of the trigger. A、I'm qualified to purchase a gun. B、I'm a good citizen. C、Anyone under 21 can't legally own a gun. D、Drug addiction may disqualify one to own a gun.

相关试题