无锚点吊推法门架高度为()三项之和。
A.工件高度
B.工件重心高度
C.基础高度
D,附加高度
参考答案:B, C, D
因动脉血流断绝而引起局部组织或器官缺血发生的坏死称为()
A.梗死
B.栓塞
C.血栓形成
D.DIC
E.坏死
It is the most instructive lecture that I______ since I came to this school.[ ]
A. attended
B. had attended
C. am attending
D. have attended