已知点A(-5,4),将它先向右平移3个单位,再向下平移3个单位后得到点B,则B点的坐标是______.
点B的坐标为(-5+3,4-3)=(-2,1).
故答案为:(-2,1).
One thousand dollars a month is not a fortune but would help cover my living ______. [ ]
A. bills
B. expenses
C. prices
D. charges
离心泵的工作点是管道特性曲线与离心泵的()曲线的交点。
A.Q-η
B.Q-N
C.Q-P
D.Q-H