一辆公共汽车进站后开始刹车,做匀减速直线运动.开始刹车后的第1 s内和第2 s内位移大小依次为9 m和7 m.则刹车后6 s内的位移是( )
An actor is usually a _____. A. man B. woman C. police
Amy is a teacher, she _____ English. A. teach B. teaches C. teacher
Chen Jie likes ____ a bike. A. ride B. riding C. rides
What _____ she like to do? A. do B. does C. is
Where does the ____come from ? It comes from the clouds. A. rain B. sun C. cloud