问题
单项选择题
液压舵机充油时,液压油一定要经过()加入系统与油箱。
A.滤油器
B.手摇泵
C.专用泵
D.A与B
答案
参考答案:A
液压舵机充油时,液压油一定要经过()加入系统与油箱。
A.滤油器
B.手摇泵
C.专用泵
D.A与B
参考答案:A
根据句意选词填空。 | |
| |
1. Oh, no! It's raining! And I forgot to bring my __________ 2. Paul helped Mary move into her new apartment, so she wrote him a _____ to thank him. 3. Tom likes The Rangers a lot. He's a real ____ of that team. 4. Our office is on the seventh floor, so we need to take the _____. 5. Did you go to the baseball ____ last Saturday? 6. Last week we saw this great ____ called Die Hard at a movie theater in the mall. 7. The ____ usually comes at 8:l0,but it's sometimes late. 8. I like this CD player, but the ____ is too high, so I'm not going to buy it . |