为了保证斜楔夹紧机构在加工时的自锁，其斜楔升角必须（）两处摩_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

为了保证斜楔夹紧机构在加工时的自锁，其斜楔升角必须（）两处摩擦角之和

A、大于

B、小于

C、等于

D、不等于

答案

参考答案：B

单项选择题

是什么装置保证吊架区域压力能快速释放掉？（）

A.是吊架接近面板上的通气口

B.是吊架的压力释放接近门

C.是吊架接近面板的安装接缝

D.是安装在吊架接近门上的通气活门

完形填空

A young man was getting ready to graduate from college, for many months he had 31 a beautiful sports car in a dealer’s showroom, and 32 his father could well 33 it, he told him that was all he wanted.
On the morning of his graduation day his father called him into his own study and told him how 34 he was to have such a fine son. He handed his son a beautiful gift box. 35 but slightly disappointed, the young man 36 the box and found a lovely book. 37 , he raised his voice at his father and said, “ 38 all your money you give me a book?” And rushed out of the house 39 the book in the study.He did not contact（联系）his father for a whole year 40 one day he saw in the street an old man who looked like his father. He 41 he had to go back home and see his father. When he arrived at his father's house, he was told that his father had been in hospital for a week. The moment he was about to 42 the hospital, he saw on the desk the 43 new book, just as he had left it one 44 ago. He opened it and began to 45 the pages. Suddenly, a car key 46 from an envelope taped behind the book. It had a tag (标签) with the dealer’s name, the 47 dealer who had the sports car he had 48 . On the tag was the 49 of his graduation, and the 50 PAID IN FULL.

B．comfortable

B．information