浓酸、强碱一旦溅入眼睛或皮肤上，首先应采用（）方法进行清洗。
A.0.5%的碳酸氢钠溶液
B.2%稀碱液中和
C.1%醋酸清洗
D.清水冲洗
参考答案：D
—Bad luck. I scored rather low in the test.
— . Or you'll have to leave school.
A．It can't be helped
B．Don't mention it
C．I'll make it up for you
D．You've got to do something
常规静脉尿路造影首次摄片时间，通常是在注射对比剂后（）
A.2分钟左右
B.5分钟左右
C.7分钟左右
D.15分钟左右
E.25分钟左右
