问题
单项选择题
压缩机迷宫封酸油排放量增大，可能原因是（）。
A、机械密封损坏
B、密封油流量大
C、密封油高位槽内的浮球型单向阀存在泄漏
D、密封油与参考气之间的压差大
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
压缩机迷宫封酸油排放量增大，可能原因是（）。
A、机械密封损坏
B、密封油流量大
C、密封油高位槽内的浮球型单向阀存在泄漏
D、密封油与参考气之间的压差大
参考答案：A
| 任务型阅读。从A-D中选出恰当的句子填入文中1-4处,然后回答第5题. |
What would you do if a stranger gave you some medicine a |
| A. In the end, he was put in prison. B. In fact, what those strangers want to give them are drugs (毒品). C. What's worse, there are about 10,000 drug users under 16 now. D. One day, some old friends told him it woul  d be fun. |