低渗性缺水最好首先补充的液体是
A．高渗盐水 B．等渗盐水 C．10%氯化钾 D．5%葡萄糖溶液 E．5%葡萄糖盐水
参考答案：B
Jessica ought to stop work.She has a headache because she _______ too long.
A．read
B．is reading
C．had read
D．has been reading
UNIX系统把用户分成三类：______、______和______。
