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刷刷题刷刷变学霸
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【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.
相关题目：
【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
【多选题】用于传动的螺纹有
A.
三角形螺纹
B.
梯形螺纹
C.
矩形螺纹
D.
锯齿形螺纹
【单选题】不等距蜗杆细纹车刀尖宽一般（）2mm。
A.
大于
B.
小于
C.
小于
D.
必须小于
【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】等距分组一般适合于( )
A.
一切变量
B.
变量变动比较均匀的情况
C.
变量变动幅度较大的情况
D.
变量变动有一定规律的情况
【单选题】管螺纹的牙型角为 度。
A.
60°
B.
55°
C.
45°
D.
30°
【单选题】常用的螺纹旋向为( )
A.
左旋
B.
右旋
【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
【多选题】螺纹防松的方法有（）
A.
加大螺纹结合长度
B.
用尼龙垫片
C.
加大螺纹拧紧扭矩
D.
用双螺母
E.
用弹簧垫圈
【判断题】在开工前应确认螺纹锁紧环式换热器系统通畅，避免管板单面超压。
A.
正确
B.
错误
【单选题】螺纹升角是指螺纹( ) 处的升角。(5分)
A.
a. 外径
B.
b. 中径
C.
c. 内径
D.
d. 以上全不对
【单选题】对不等距螺纹小径尺寸要求（）。
A.
前小后大
B.
前大后小
C.
随距变化
D.
相同
【单选题】组距数列中的等距数列是指（）
A.
各组次数相等的数列
B.
各组组中值相等的数列
C.
各组组距相等的数列
D.
各组频率相等的数列
【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
【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
【单选题】螺纹公差带是以（）的⽛型公差带。
A.
基本⽛型的轮廓为零线
B.
中径线为零线
C.
⼤径线为零线
D.
⼩径线为零线