对长期停用的管线应作何处理?
参考答案:
要排空;如果长期不用,要用蒸汽吹扫处理干净或堵上盲板;管线两端的阀门要打好铅封;确实不再利用了的管线应拆除。
解决我国水资源时间分布不均的方法,最主要的是______,解决水资源地区分布不均的最有效方法是______.
The plan he _____ at the meeting is under consideration now and the result will be____ soon.
A.put up with; put up
B.came up with; come up
C.put forward; put up
D.came up with; come out