关于传统 Ethernet 的描述中，错误的是()
A、是一种典型的环型局域网A
解析：传统Ethernet是一种总线型局域网，传输的数据单元是Ethernet帧，介质访问控制方法是CSMA/CD，网络结点发送数据前需侦听总线。选项A错误，故选择A选项。
to，I，put，the，ball，in，the，box，want
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boy_______(复数)
Thenumberofsecondsinoneday_____Thenumberofminutesinoneweek
“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.
根据短文内容，回答问题.
1.Whatdoes“earlytobed.earlytorise”mean?
2.Whatmustthebodyhavetobehealthy?
3.WhatwillhappentoChildrenofyoungagewhodon'thaveenoughsleep?
4.Whatkeepsthebodystrong?
5.Whattakesfoodtoallpartsofourbody?
如图所示，小车放在光滑的水平面上，将系绳小球拉开到一定角度，然后同时放开小球和小车，那么在以后的过程中()
