免疫浊度法进行血清蛋白质定量时。通常采用几点来制定标准曲线（）
A.1点
B.2点
C.3点
D.4点
E.5点
参考答案：E
The manager introduced the rules that she would like to see _______ the next year.
A．establish
B．establishing
C．established
D．to establish
当设备连续（）帧没有接收到合法的指针值，设备将产生LOP告警。
A.4
B.8
C.12
D.3
