如图所示，质量为m的小物块以初速度v0沿足够长的固定斜面上滑，_爱下问搜题

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问题多选题

如图所示，质量为m的小物块以初速度v₀沿足够长的固定斜面上滑，斜面倾角为θ，物块与该斜面间的动摩擦因数μ>tanθ，下图中表示该物块的速度v和所受摩擦力f随时间t变化的图线（以初速度v₀的方向为正方向），可能正确的是

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A．

B．

C．

D．

答案

AC

填空题

选择所给的词完成短文，必要时作相应的变化。

much many is dream reporter about of hard also a

     I have a ___1___ one day in the year of 2008 when Beijing hosts the
Olympic Game, I, ___2___ 18-year-old university student , is going to
___3___ a guide for ___4___ foreign athletes, news ___5___ and
tourists.   I'm going to tell them many stories about China,   a nation of
5000 years ___6___ history. I am ___7___ going to tell them in English
__8__ Beijing,   a city of 3000 years of history. So I am going to study
__9__ from now on.   I'm going to speak and write English as __10___
as I can. Do you want to have a dream like me?

判断题

收益的稳定性是证券公司自营业务的特点之一。