题目

在一个内壁光滑轴线竖直的圆锥形桶内，两个质量相等的小球A、B紧贴着桶的内壁分别在不同高度的水平面内做匀速圆周运动，如图所示，则下列说法正确的是（） （1）两球对筒壁的压力大小相等； （2）A球的线速度一定大于B球的线速度； （3）A球的角速度一定大于B球的角速度； （4）两球运动的周期相等．     A．             （1）（2）           B． （2）（3）       C． （1）（4） D． （2）（4） Driver Wanted Clean driving license Good-looking Aged over 2.5 Apply(申请) to：Capes Taxi，Hunan Tel：0731-6561382    13173158818 Teacher Needed For private language school Teaching experience necessary Apply to：Instant Languages Ltd，Dalian Tel：0411-4313861 Air Hostess(空中小姐)Wanted Age：between 20 and 33 Height：from 1.6m to 1.75m Two foreign languages College graduate Apply to：China Airlines，Beijing Tel：010-68634098 1．If Li Hua wants to work in Beijing，she Can apply for a job as __________．    A．a driver    B．an air hostesee    C．a teacher    D．a pilot 2．You may call __________ when you want to be a teacher． A．0731-6561382    B．0411-4313861    C．010-68634098    D．13173158818 3．__________ may prevent(阻碍)Jack，an experienced taxi driver，from working for Capes Taxi． A．Sometimes drinking wines    B．Not having college education C．Breaking traffic rules        D．Being 26 years old 4．__________ is not mentioned in the three ads．    A．Health    B．Age    C．Height    D．Experience 5．Look at the resume(简历)of Ma Li．Which job can she apply for? Name：Ma Li Age：23 Height：1.70m Language：English and Japanese Graduate：Peking University   A．Driving for Capes Taxi．            B．Working for China Airlines．   C．Teaching at Instant Language Lid．    D．None of the jobs．