小儿重度脱水，丢失水分占体重的百分比为（）。
A.<5%
B.5%～7%
C.8%～10%
D.>10%
E.>8%
参考答案：D
They_________ all their money, so they have to walk home now.
A. spend B. will spend C. have spent
一、二级耐火等级的高层民用建筑之间的防火间距为（）。
A．9m
B．11m
C．13m
D．14m
