溴化锂吸收式制冷机长期停机如果溶液颜色变红变绿,应对溶液进行处理、然后重新测定溶液()并调整到最需范围。
A.浓度
B.比重
C.PH值
D.比热
参考答案:C
It's cold in winter here ______ we usually stay at home. [ ]
A. and
B. but
C. or
D. because
表证有汗,可见于()
A.表寒证
B.表热证
C.表虚证
D.表实证
E.伤湿证