----What's your father?
---- He is a doctor. He _________ in a local hospital.
A:worked
B:has worked
C:works
D:will work
一辆汽车沿平直公路从甲站开往乙站,启动加速度为2m/s2,加速行驶5秒后匀速行驶2分钟,然后刹车,滑行50m,正好到达乙站,求:
关于自由落体运动,下列说法正确的是 ( )
读北半球某地海平面等压线分布图,回答问题。
____ ____ does she watch TV ?