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【单选题】

内螺纹的小径应画 。

A.
粗实线
B.
细实线
C.
虚线
D.
点划线
题目标签:内螺纹小径螺纹
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参考答案:
参考解析:
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【单选题】矩形螺纹是()。

A.
标准螺纹
B.
普通螺纹
C.
非标准螺纹
D.
管螺纹

【单选题】HorsesWheneveranyone asks me what my favorite animal is, I always say, "Horses," I like almost all animals. _____(26)I don't have a horse of my own. Horses are very expensive. _____(27) You have to pa...

A.
There I could be around horses all the time.
B.
We're very lucky to live near a horse stable.
C.
It's very expensive to buy one and to own one.
D.
But horses have always been my very favorite animals.
E.
My favorite horse "Vrana" is older than a lot of other horses.
F.
For example, a horse is happy if its ears are forward and its tail is relaxed.

【单选题】螺纹标记:M20×2—7h6h—L,其中6h为()。

A.
外螺纹大径公差带代号
B.
内螺纹中径公差带代号
C.
外螺纹小径公差带代号
D.
外螺纹中径公差带代号

【单选题】根据螺纹标记Rc 3/4,该螺纹是

A.
普通螺纹
B.
梯形螺纹
C.
锯齿形螺纹
D.
方牙螺纹
E.
用螺纹密封的管螺纹
F.
非螺纹密封的管螺纹