泄漏性试验应重点检验包括(),以发泡剂检验不泄漏为合格。
A.阀门填料函
B.法兰连接处
C.螺纹连接处
D.施焊焊缝处
E.放空、排气、排水等阀
参考答案:A, B, C, E
—Oh, you haven't read my e-mail?
—Sorry, I haven't had any to the computer these days.[ ]
A. aids
B. basis
C. access
D. beliefs
Which is _____ season in Beijing? [ ]
A. better
B. best
C. the best