同一室内的电源、电话、电视等插座面板应在同一水平标高上，高差应小于（）。
参考答案：3mm
We can be proud of ourselves, but we had better find out _____ we have got to be proud of. [ ]
A. what is it that
B. that what it is
C. what it is that
D. that what is it
小儿腹泻时，重度脱水的失水量为体重的
A．5％～10％
B．15％～25％
C．10％～15％
D．20％～25％
E．10％以上
