计算（﹣5）+3的结果等于（ ）
A：2
B：-2
C：-8
D：8
25的4倍等于50的2倍．
The team will move a speed of 15 kilometers per hour, and have a short break every 2 hours. During the break they will tell stories_______ English.
下列地图能最直观地表示地形高低起伏状况的是（ ）
