用来表示单级传动圆柱齿轮减速器型号是()。
A.ZDY
B.ZLY
C.ZSY
D.ZMY
参考答案:A
They are living with their parents for the moment because their own house ____. [ ]
A. is being rebuilt
B. has been rebuilt
C. is rebuilt
D. has rebuilt
血瘀的疼痛特点是()
A.胸胁胀痛
B.痛如针刺
C.关节冷痛
D.空虚隐痛
E.游走作痛