某钢尺尺长方程式为lt=50.0044m+1.25X10-5X(t-20)X50m,在温度为31.4°C和标准拉力下量得均匀坡度两点间的距离为49.9062m,高差为-0.705m。则该两点间的实际水平距离为:
A.49. 904m B.49. 913m C.49. 923m D.49. 906m正确答案B
某钢尺尺长方程式为lt=50.0044m+1.25X10-5X(t-20)X50m,在温度为31.4°C和标准拉力下量得均匀坡度两点间的距离为49.9062m,高差为-0.705m。则该两点间的实际水平距离为:
A.49. 904m B.49. 913m C.49. 923m D.49. 906m正确答案B