可安装在管道或设备的任何位置的阀门为()。
A.止回阀
B.疏水阀
C.蝶阀
D.闸阀
参考答案:B
成人CSF腰穿蛋白质参考值为()
A.0.1~0.3g/L
B.0.2~0.4g/L
C.0.4~0.6g/L
D.0.6~0.8g/L
E.0.8~1.0g/L
—What color is your coat?
— .[ ]
A. It's an orange
B. It's orange
C. It's a blue
D. It's the green