单项选择题
A.静态方法计算 B.平均值法计算 C.抽样均值法计算 D.动态方法计算
A.350mm和130mm B.320mm和130mm C.300mm和150mm D.280mm和140mm
A.0.80m和1.00m B.0.70m和0.90m C.0.65m和0.90m D.0.65m和0.80m