温度计读数时,为了消除视觉误差,眼睛一定要与液面()。
A、远离
B、平行
C、垂直
D、倾斜
参考答案:C
A. choose, as
B. have chosen, as
C. chose, as
D. have chose, as
过氧化值为10mmol/kg,相当于20meq/kg.