再生注氯量低于()kg/h大于()秒,注氯系统停。
参考答案:0.84,30
Here ________ a photo ________ my room.
A.are; of
B.is; in
C.are; in
D.is; of
下列哪种器具不能用于刮痧:()
A.水牛角
B.玉石
C.塑料汤勺