阅读理解。

     Wei Jun is a good driver. He is twenty-three years old. He drives a car in a machine factory. He works

from Monday to Friday. His home is far (远) away from the factory. He gets up at half past five. He goes

to work at six o'clock. At half past seven he must get there. He has no time to have breakfast. He leaves

the factory at five o'clock. He cooks supper and does housework in the evening. He likes reading a lot.

Sometimes he watches TV. He goes to bed at about ten.

1. Wei Jun _____.

A. is a worker

B. is a car driver

C. teaches in the factory

D. makes machines

2. On Saturday and Sunday Wei Jun _____.

A. doesn't go to work

B. stays at home?

C. goes to the factory

D. reads books

3. _____, so he has no time to have breakfast.

A. He is ver busy

B. His factory is too far

C. He doesn't like having breakfast

D. He often gets up early

4. He has lunch _____.

A. at home

B. in his car

C. in the factory

D. in the park

5. He _____ in the evening.

A. washes his clothes

B. cooks supper

C. does housework

D. both B and C

车削多线蜗杆时，应根据蜗杆的（）选择进给箱手柄的位置。

A.螺纹升角

B.导程角

C.齿距

D.导程