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什么是分模面？其选择的基本原则有哪些？

答案

参考答案：

分模面：开式模锻中，根据锻件形状将模膛分成上下两个半模的分界面。

选择的基本原则：

1.锻件容易取出；

2.锻件形状尽可能与零件形状相同；

3.尽量采用镦粗充填成形。

单项选择题

某部分框支剪力墙结构，房屋高度45.9m。该建筑为丙类建筑，抗震设防烈度为7度，Ⅱ类建筑场地。第3层为转换层：纵横向均有落地剪力墙：地下一层板顶作为上部结构的嵌固端。

第4层某框支梁上剪力墙墙肢W2的厚度为180mm，该框支梁净跨L0=6000mm。框支梁与墙体W2交接面上考虑风荷载、地震作用组合的水平拉应力设计值σmax=0.97MPa。试问，W2墙肢在框支梁上0.2L0=1200mm高度范围内的水平分布筋实际配筋(双排)选择下列（）项时，其钢筋面积Ash才能满足规程要求且最接近计算结果。

提示：HPB235级钢筋强度设计值fy=210N/mm；HRB335级钢筋φ强度设计值fy=300N/mm。

A．φ8@200(As=604mm2/1200mm)

B．φ10@200(As=942mm2/1200mm)

C．φ10@150(As=1256mm2/1200mm)

D．φ12@200(As=1356mm2/1200mm)
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完形填空

第二节：语法填空 (共10小题；每小题1分，满分10分)

Childhood is a time ­­（41） there are few responsibilities to make life difficult. If a child has good parents, he is fed, looked after and loved, whatever he may do. (42) is impossible that he will ever again in his life (43) (give) so much without having to do anything in return. But a child has his pains; he is not so free to do (44) he wishes to; he is continually being told not to do something, or being punished for what he has done wrong.

When the child has become a young man and this young man starts to earn his own living, he can no longer expect (45) to pay for his food, his clothes, and his room, but has to work on his own if he wants to live (46) (comfort). If he spends most of his time (47) (play) about in the way that he used to as a child, he will go (48) (hunger). If, (49), he works hard, keeps out of trouble and has good health, he can have the great happiness of building up for himself his own position in (50) (social).
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