硬铝导体的最大允许应力为（）MPa。
A.70
B.90
C.110
D.140
参考答案：A
- Have you finished writing your book? - Yes. It _______ and _______ soon.
A．is printing; is coming out
B．is being printed; will come out
C．is going to print, will be come out
D．is printed; has come out
（）
A.
B.
C.
D.﹣3
（）
