正常原尿中不含有的成分是（）
A．葡萄糖
B．Na+
C．尿素
D．蛋白质
E．HCO3-
参考答案：D
— Where have you been?
— I got caught in traffic; otherwise________sooner.[ ]
A. I would be here
B. I have been here
C. I had been here
D. I would have been here
佐剂的作用（）、（）、（）、（）。
