一辆重为1.5×10⁴N的小汽车,当它以36Km/h的速度在水平路面上匀速行驶时受到的阻力为2000N,则该汽车匀速行驶2min所做的功为____J，汽车的功率为____W。

阅读下面材料, 从A、B、C、D四个选项中选出最佳选项。

    Harold had a very difficult time last night．AIl the other students in his English class went to a party at their teacher's house．but Harold never got there．He followed his teacher's directions(指引), but he made one little mistake．

    From their school, he walked along Main Street to Central Road and turned left．He took the Central Road bus and got off at Fifth Street．He turned left and walked up Park Street to the bus stop at the corner of the street．

    He took Bus Number 42, but he got off the wrong stop．He got off at River Road instead of Rolling Road．He turned left and walked along River Road one block．He turned left again and walked two blocks, turned right, and got completely lost．

Harold was very upset(失落)．He really wanted to go to the party last night, and he can't believe he made such a stupid(愚蠢的)mistake．

A汽车以10m/s速度匀速前进，B汽车同时同地同向做匀加速直线运动，一开始由于A的速度比B大，所以A超过B，经过10s钟B追上A，又经过10s钟B汽车超过A汽车100m，则（  ）

如果方程$\frac{x^2}{4-m}+\frac{y^2}{m-3}=1$表示焦点在y轴上的椭圆，则m的取值范围是（　　）