动脉粥样硬化病变最常累及哪一支冠状动脉()。
A.左冠状动脉主干
B.左冠状动脉回旋支
C.左冠状动脉前降支
D.右冠状动脉后降支
E.右冠状动脉窦房结支
参考答案:C
After school I found Mother was in bed sick. ____ Mother was ill, I should do something for her.[ ]
A. So
B. Though
C. Since
D. If
注塑制品的后处理一般为()。
A.退火
B.调湿
C.淬火
D.回火