扭角羚属国家一级保护动物主要分布在山西吕梁山和河北西北部山地。[ ]
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一辆电动小车由静止开始沿直线运动,其v-t图象如图所示,则汽车在0~1s和1s~3s两段时间内( )
A.运动方向相反
B.位移相同
C.加速度相同
D.平均速度相同
Had the US Airways captain not guided his jet to a safe landing on the Hudson River, just west of New York, over 100 people aboard ______, along with many more on the ground.
A.might have died
B.needn’t have died
C.must die
D.shouldn’t die