填空题。

1.  The question is so hard that _______students can answer it. (用a few或few填空)

2. —Is the new rule working?

    —Yes, ______books are stolen (被偷). (用ra few或few填空)

3.  Don't worry,   we still have ______minutes left. (用a few或few填空)

4. There are so ______trees on the hill.  The birds can't even find a place as thei home.

(用a few或few填空)

该病人可能存在

A．高渗性脱水

B．等渗性脱水

C．低渗性脱水

D．高钾血症

E．稀释性低血钠症