测定残余尿，哪种方法最准确（）
A.排泄性尿路造影
B.排尿后立即用导尿管测定
C.膀胱区的叩诊法
D.B超
E.核素肾图
参考答案：B
—Are there ______art rooms in the picture?
—Yes, there are _______.[ ]
A. some; any
B. some; some
C. any; any
D. any; some
矿井反风风量不得低于正常风量的百分之多少？
