钻直径超过30mm的大孔一般要分两次钻削，先用（ ）倍孔径的钻头钻孔，然后用与要求孔径一样的钻头扩孔。
A. 0.3～0.4
B. 0.5～0.7
C. 0.8～0.9
D. 1～1.2
套螺纹前圆杆直径应（ ）螺纹的大径尺寸。
A. 稍大于
B. 稍小于
C. 等于
D. 大于或等于
下面（ ）不属于装配工艺过程的内容。
A. 装配前的准备工作
B. 装配工作的组织形式
C. 装配工作
D. 喷漆、涂油、装箱
What is the writer's view in the reading passage
A. He believes that there are too many MBAs.
B. He believes that the degree is over-valued.
C. He believes that standards are inconsistent,
D. He believes that the degree has dubious valu
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