足球以8m/s的速度飞来,运动员把它以12m/s的速度反向踢出,踢球时间为0.2s,设球飞来的方向为正方向,则足球在这段时间内的加速度是(设踢足球的力为恒力)( )
Oh, so ________ things! A.many B.much C.lot of
选出不同类别的单词。(20分) ( )(1)A.shopping B.skating C.read ( )(2)A.ruler B.notebook C.Teddy Bear ( )(3)A.good B.go C.buy ( )(4)A.bread B.juice C.marker
I like ________. A.running B.sing C.paint
I ________ go to my art class. A.am B.is C.will
I can ________. A.playing football B.plays football C.play football