问题
问答题 简答题
简述卸载阀的作用。
答案
参考答案：
卸载阀的作用是、在工作面支架不需要压力液而泵仍在运转时，泵排出的压力液可通过卸载阀直接流回乳化液箱，使泵在空载下工作。
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简述卸载阀的作用。
参考答案：
卸载阀的作用是、在工作面支架不需要压力液而泵仍在运转时，泵排出的压力液可通过卸载阀直接流回乳化液箱，使泵在空载下工作。
| 阅读理解 | ||
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| 1. Which of the following statements is TRUE? | ||
| A. Simon wants Tommy to come to the party. B. Tommy wants Simon to come to the party. C. Simon doesn't want Tommy to come to the party. D. Tommy doesn't want Simon to come to the party. | ||
| 2. The party will begin at __________. | ||
| A. 5 p. m on 13th May B. 2 p. m on 13th March C. 2 p.m on 13th May D. 5 p. m on 13th March | ||
| 3. The party will be on for __________. | ||
| A. one hour B. two hours C. three hours D. four hours | ||
| 4. The party will be in __________. | ||
| A. Tommy's home B. Simon's house C. the school D. the park | ||
| 5. Tommy can't come because he will __________ that day. | ||
| A. see a film B. go fishing C. meet his old friends D. be busy working |