临床上中度脱水，其缺水量约为体重的（）。
A.4％～6％
B.>9％
C.7％～8％
D.2％～3％
E.<1％
参考答案：A
– How was your last weekend ?
– It relaxing. I great fun.
A．was; have
B．is; have
C．was; had
D．is; had
频率为87.5MHz的电磁波的在真空中的波长是多大？
