康明斯KTA-19G2柴油机D级保养的时间间隔为()。
A.250h或半年
B.500h或半年
C.1500h或1年
D.4500h或2年
参考答案:D
高压验电器可分为()几类。
A.发光型
B.手柄式
C.声光型
D.风车式
用所给词的正确形式填空
1. Tom____(like) eggs.
2. She____ (not have)a nice watch.
3. Jim____(have)a nice watch.
4. The English song____ (sound) very good.
5. They____(watch) TV every day.
6. His____(orange) are very big.
7. There____ (be)a lot of broccoli on the table.
8. Lucy's keys____(be) on the desk.
9. There is some____ (orange) in the bottle.
10. How____ (much) eggs do you have?