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【单选题】

冲头冲入凹模的深度为（）张料厚最佳。

A.
1
B.
3
C.
5
D.
7
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题目标签：凹模最佳冲头
参考答案：
参考解析：
.
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【单选题】复合模中同时具有落料凸模和冲孔凹模作用的零件称为
A.
凹模
B.
凸模
C.
凸凹模
D.
冲孔凸模
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【单选题】当凸、凹模间隙变大时，采用加热后局部锻打、用手锤敲击铜棒将刃口向（ ）挤压，以改变刃口尺寸的方法修磨。
A.
两边方向
B.
直径方向
C.
前方
D.
中心方向
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【单选题】最佳修复方案是
A.
直接改为活动义齿修复
B.
采用种植固定义齿修复
C.
全冠修复基牙后再改为活动义齿修复
D.
增加前端基牙数再行固定修复
E.
增加前端基牙数目再行固定活动联合修复
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【多选题】凸、凹模分开制造时，它们的制造公差应符合__________的条件。
A.
δ凸 + δ凹 > 2cmax-2cmin
B.
δ凸 + δ凹 = 2cmax-2cmin
C.
δ凸 + δ凹 2cmax-2cmin
D.
δ凸 + δ凹 >= 2cmax
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【多选题】空心冲头一般用于()上冲孔，当用钢锭锻制锻件的孔径大于()mm时采用。
A.
水压机
B.
400
C.
300
D.
500
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【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing (裁判) decisions that denied victory to their team. A researcher was appointed to study the performanc...
A.
The ideal retirement age for an experienced football referee is 35.
B.
Age should not be the chief consideration in choosing a football referee.
C.
A football referee should be as young and energetic as possible.
D.
An experienced football referee can do well even when in poor physical condition.
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【判断题】仿形磨削主要用于磨削尺寸较小的凸模和凹模拼块。
A.
正确
B.
错误
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【简答题】[名词解释] 生物最佳粒径
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【简答题】以下哪一个零件不属于成型零件()。A凹模B凸模C主流道衬套D型芯
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【单选题】Long after the 1998 World Cup was won, disappointed fans were still cursing the disputed refereeing(裁判) decisions that denied victory to their team. A researcher was appointed to study the performance...
A.
slightly above average
B.
higher than in the 1998 World Cup
C.
quite unexpected
D.
as high as in a standard match
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