改革開放以來,我國的社會主義民主法制建設取得了重要進展,下列相關成果表述正確的是
下列有關人體生命活動調節的敘述,錯誤的是()
如圖所示,有n(n>6)個相同的小物塊(可視為質點)靜止在傾角為θ的傾斜軌道上,物塊與軌道間的動摩擦因數均為μ。每個物塊的質量均為m,相鄰物塊間的距離均為l。使第1個物塊以某一初速度v0沿軌道開始下滑,在每次發生碰撞時物塊都立即粘合在一起運動,且碰撞一直能持續下去,重力加速度為g。
(1)求第一次碰撞前瞬間小物塊l的速度;
(2)設第5次碰擅前的瞬間運動物塊的動能為Ek5,第5次碰撞過程中系統損失的機械能為E損5,求E損5和Ek5的比值。
“Earlytobed,earlytorise”makesamanhealthy,wealthyandwise.It'sgoodforthebody.Thisisanoldsaying.Haveyouheardofitbefore?Itmeansthatwemustgotobedearlyatnight,andgetupearlyinthemorning.Thenweshallbehealthy.Weshallalsoberichandclever.Thatistrue.Thebodymusthaveenoughsleeptobehealthy.Childrenofyoungageshouldhaveenoughsleep,ortheycan'tdotheirworkverywell.Theywillnotbewiseandtheymaynotbecome。wealthy!.Thebodyalsoneedsexercise:walking,running,jumping,swimming,playinggamesandallother。exercise.Exercisekeepsthebodystrong.Exercisealsohelpsthebloodtomovearoundinsidethe.body.Thisisveryimportant.Ourbloodtakesfoodtoallpartsofourbody.Theheadalsoneeds.blood.Exercisehelpsustothinkbetter.
根據短文內容,回答問題.
1.Whatdoes“earlytobed.earlytorise”mean?
2.Whatmustthebodyhavetobehealthy?
3.WhatwillhappentoChildrenofyoungagewhodon'thaveenoughsleep?
4.Whatkeepsthebodystrong?
5.Whattakesfoodtoallpartsofourbody?
世界海洋航線中,運輸量的是()