一般情况下焊缝及附近受到的焊接应力为拉应力。
参考答案：对
下列哪一项不可见AST／ALT>1（）
A.肝硬化
B.肌萎缩
C.急性病毒性肝炎
D.AMI
E.慢性活动性肝炎
The number of foreign students attending Chinese universities ____ rising steadily since 1990. [ ]
A. is
B. are
C. has been
D. have been
