问题
单项选择题
泵控型自动绞缆机为在停泊时节省功率和防油过热，可采用（）方法。
A.改用小泵加溢流阀
B.用压力继电器加蓄能器使泵间断工作
C.用限压式变量泵
D.A或B
答案
参考答案：C
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泵控型自动绞缆机为在停泊时节省功率和防油过热，可采用（）方法。
A.改用小泵加溢流阀
B.用压力继电器加蓄能器使泵间断工作
C.用限压式变量泵
D.A或B
参考答案：C
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| What do you do at the weekend? Some people like to 1 at home, but others like to go 2 a walk or play football. Mr Jack works hard in factory during the 3 . At the weekend, he always 4 the same thing. On Saturday he 5 his car and on 6 he goes with his family to a village by car. His uncle and aunt have a farm there. It isn't a 7 one, but there is always 8 work to do on the farm. The children help with the animals and give them their 9 . Jack and his wife help in the fields. At the end of the day, they are all 10 and Jack's aunt gives a big meals. | |||
| ( )1. A. work ( )2. A. out ( )3. A. day ( )4. A. does ( )5. A. sweeps ( )6. A. Monday ( )7. A. small ( )8. A. much ( )9. A. clothes ( )10.A. early | B. sit B. for B. evening B. has B. driving B. Sunday B. big B. many B. drinks B. late | C. stay C. to C. night C. goes C. sells C. Saturday C. far C. little C. food C. hungry | D. play D. away D. weekdays D. plays D. washes D. Wednesday D. long D. few D. water D. full |