呼吸性酸中毒,可引起()。
A.高碳酸血症
B.低碳酸血症
C.PH明显升高
D.低钾血症
E.低钠血症
参考答案:A
—_____ workers are there in the factory?
—There are 500. [ ]
A. How many
B. How much
C. How
D. How old
国标规定,“公差带大小”由基本偏差来确定