一辆汽车以20m/s的速度沿平直公路行驶,当汽车以大小为5m/s2的加速度刹车时,刹车2s内与6秒内的位移之比为( )
A:1:1
B:3:1
C:3:4
D:4:3
依次给出下列一组数:﹣2,4,﹣8,16,﹣32,…
(2016•内江)如图是南美洲厄瓜多尔部分地理要素图,甲地的经纬度是( )
—I think you are right. We should talk with our parents or they may feel sad.