在PN≤1.6MPa，T≤250℃的情况下，一般选用（）法兰。
A、平焊
B、对焊
C、螺纹
D、法兰盲板
参考答案：A
龙柏
It's nearly ten o' clock and father is _____ to come back at any moment. [ ]
A. possible
B. probable
C. possibly
D. likely
