炒炭后,挥发油中检出新成分,并具有止血作用的药物是()
A.大黄
B.竹茹
C.荆芥
D.槐花
E.泽泻
参考答案:C
______ label to each of the trees, with detailed introduction of their features, and visitors will know more about them and how to protect them.
A.To attach
B.Attach
C.Attached
D.Having attached
决定CT机连续工作时间长短的机器性能指标是()
A.磁盘容量
B.电源容量
C.X线管热容量
D.X线管焦点
E.扫描时间