临床常用的超声探头频率约为 ( )
A.2.5MHz
B.3.5 MHz
C.5.0 MHz
D.7.5 MHz
E.以上都对
参考答案:E
According to the embarrassing situation here, I’m afraid that your arrival at present is not quiet ________.
A.in practice
B.in demand
C.in place
D.in turn
断肢(指)的急救不包括哪个方面()
A.止血
B.包扎
C.保存断肢(指)
D.迅速运送
E.输血