问题
单项选择题
防止离心式压缩机润滑油和封油污染的处理措施不正确的是（）。
A.保证密封气压力的稳定性
B.提高梳齿密封装置工作的稳定
C.气体介质不需要增设脱液设施
D.做好蒸汽的脱水
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
防止离心式压缩机润滑油和封油污染的处理措施不正确的是（）。
A.保证密封气压力的稳定性
B.提高梳齿密封装置工作的稳定
C.气体介质不需要增设脱液设施
D.做好蒸汽的脱水
参考答案：C
| 完形填空。 | |||
| My dear kids, here are some _____ for you. As the students in our school, you have to obey (遵守) them. Don't __2___ late for school. You have to be here by eight. Don't eat in the classroom __3___ you can eat in the dining hall. Get back home before six in the afternoon. You can't eat ___4__ and you can only eat at school at noon Don't ___5__ with your classmates or other students. You can wear glasses in class. But you can't wear __6___. Clean the ___7__ after school. You have to __8___ sports shoes for P. E. class in the ___9__. You can't go out on school _10____.It is dangerous to go out at night. . Go to the music room if you want to listen to music. Hand in (上交) your homework on time. | |||
| ( ) 1. A. opinions ( ) 2. A. fun ( ) 3. A. or ( ) 4. A. inside ( ) 5. A. talk ( ) 6. A. wallet ( ) 7. A. study ( ) 8. A. wear ( ) 9. A. gym ( ) 10. A. morning | B. suggestions B. arrive B. so B. beside B. wash B. sunglasses B. shop B. on B. dining hall B. noon | C. guides C. return C. but C. outside C. stand C. belt C. classroom C. in C. palace C. afternoon | D. rules D. walk D. and D. around D. fight D. clothes D. bedroom D. with D. square D. nights |