临床上用药的主体是
A．单个的病人
B．医药卫生人员
C．医疗机构
D．社区甚至国家
E．以上都是
参考答案：E
As we all know, every minute _____ full use of ____ our lessons will do good to us students.
A．which makes; studying
B．when made; to study
C．that is made; study
D．that is made; studying
关于胆囊结石，下列描述不正确的是
A．均为强回声团B．随体位移动C．后方伴声影D．胆囊窝处弧形强回声带E．可伴有胆泥回声
