The students know        to do the job well.    [ ]

A. many enough        

B. much enough    

C. many knowledge      

D. much words

低渗性缺水的体液容量改变为

A．细胞内液减少，细胞外液正常

B．细胞内、外液等量减少

C．细胞内液显著减少，细胞外液轻度减少

D．细胞内液轻度减少，细胞外液显著减少