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问题 单项选择题

在粗车悬伸较长的轴类零件时，如果切削余量较大，可以采用（）方式进行加工，以防止工件产生较大的变形。

A.大进给量

B.高转速

C.循环除去余量

D.以上均可

答案

参考答案：C

阅读理解

House of Porridge

Welcome to Clark’s Porridge House. We have different kinds of porridge. We have meat porridge, vegetable porridge. And fruit porridge is our special, it is only RMB 4 yuan for one bowl. A bowl of meat is RMB 5 yuan. Vegetable porridge is RMB 3 yuan for one bowl, but RMB 5 yuan for two. We have thin pancakes, too. They are RMB 5 yuan for ten. Come and taste the delicious food here. If you are too busy to come, make a telephone call to us and we can send the food to you in 20 minutes.

阅读以上信息，完成下面的句子，每空一词。

小题1:The owner of this porridge house is Mr.     .

小题2:The cheapest is the       porridge in the restaurant.

小题3:If you eat a bowl of meat porridge and five thin pancakes, you will pay RMB       yuan.

小题4:Please       us if you can’t come.

小题5:If you order some food in this restaurant at six o’clock, Maybe you will get it at

about       .
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问答题

背景材料：
某桥梁施工企业在长江上施工一座大桥，上部结构为后张法预应力箱梁形式，在施工组织设计中制定了后张法预应力筋的加工和张拉的主要检测内容如下：
(1)预应力筋的各项技术性能；
(2)预应力管道坐标、及管道间距；
(3)张拉时的应力值、张拉伸长率和张拉断丝滑丝数。
2．问题：
(1)这家企业在完成以上检测内容前，还需要做哪些工作
(2)其中对张拉伸长率和张拉断丝滑丝数有什么具体的要求
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