题干

一只玻璃瓶,下列情况下玻璃瓶没有受摩擦力的是(   )

A:瓶子静止在倾斜的桌面上

B:瓶子被握在手中,瓶口朝上

C:瓶子压着一张纸条,扶住瓶子把纸条抽出

D:瓶子压在木板上,让瓶子和木板一起在粗糙的水平桌面上匀速直线运动

上一题 下一题 0.0难度 选择题 更新时间:2019-05-07 01:19:16

答案(点此获取答案解析)

D

同类题4

阅读理解

    Many musicians meet and form a band(乐队)because they like to write and play their own music.They may start as a group of high school students and practise their music in someone's house.Sometimes they may play to passers-by in the street or underground so that they can get some money for themselves or pay for their instruments(乐器).

    However,there was one band that started in a different way.It was called the Monkees and was formed in 1965.It began as a TV show.The TV show had planned to find four rock musicians who could act as well as sing.But they could only find one who was good enough.They had to use actors for the other three members of the band.

    Since some of these actors could not sing well enough,they had to ask for help from other musicians.So at first,the band just pretended(假装)to sing.Anyway,their performances(演出)were excellent and they got lots of fans.Each week on TV,the Monkees would pretend to play and sing songs written by other musicians.After a year or so,they became more serious about their work.They started to play and sing their own songs like a real band.Then they produced(制作)their own records and started touring and playing their own music.In the US they became even more influential and popular than the Beatles and sold even more records.

    However,the band broke up around 1970.But happily they reunited(重聚)in the 1980s.They produced a new record in 1996 to celebrate their time as a band.It was very successful.Today the Monkees are still making music for their millions of fans.

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