题目已知A点高程为45.763米,B点高程为42.165米,则A到B的高差h_(AB)为( )米。A. -3.598B. 3.592C. 3.598D. -3.592已知A点高程为45.763米,B点高程为42.165米,则A到B的高差$h_{AB}$为( )米。A. -3.598B. 3.592C. 3.598D. -3.592题目解答答案A. -3.598