急性肾衰竭患者出现以下哪种表现提示酸中毒（）
A.呼吸表浅
B.呼吸浅快
C.呼吸浅慢
D.深大呼吸
E.潮式呼吸
参考答案：D
Na2O2的摩尔质量是（ ）
A．78
B．78g
C．78g/mol
D．78mol
Another 20% worked well, but the remaining 60% should have been scrapped. ( )
A．scratched
B．renovated
C．stimulated
D．introduced
