我们在车站从2:40等到3:00
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/07 21:34:06
设中间3个站为a.b.c.A到a.b.c.B一共4种票,a到b.c.B一共3种,依次类推,4+3+2+1=10
1.Wewillgetto(arriveat)thestationbyfive.2.Shegottoourhouseveryearly.
1.Iwaiteduntilthetrainleftthestation.2.Hiseysarefulloftears.3.NeitherofthemhasbeeninJapan.4.Wouldyou
Thebuswaslate,wewaitedfrom2:40to3:00inthestationuntilsolemnlyTomysurprise,thechildgavemeafullboxofch
Iwaiteduntilthetrainleftthestation.
1.IchmoechtezumBahnhofgehen.WelcherBuskannichnehmen?InWelcheBushaltstellesteigtichaus?2.Ichmoechtezu
We'vebeenwaitinguntil5o'clock
1.Memoryisessentialforlife.2.MemoryandIfeelabout.3.Theteacherwastellingusaboutamemoryjokes4.I'dliket
10cm/s2=0.1m/s2,72km/h=20m/s,快车做匀减速直线运动的加速度大小a2=v22x=4004000=0.1m/s2,设经过t时间开始错车,则有:12a1t2+vt−12a2t2=
3÷[(3÷4×60+17-2)÷60]=3÷[(45+15)÷60]=3÷1=3(千米/小时)
A:1)earlyinthemorning,wemetattheschoolgatesetouttoclimbamountain.2)earlyinthemorning,wedrovetoastati
wedidnotleave,untilhecamebackhome
Myfatherisreadingnewspapers,andmymotheriscooking。whenwegottobusstop,itwasraining。再问:你的回答完美的解决了我的问题,谢
Shallwemeetatthreeatthebusstation?
tB=2S/VB=2*2000/20=200saB=VB/tB=20/200=0.1m/s^2设:相遇(错车)时间t(aAt^2)/2+[VB*t-(aBt^2)/2]=2000aAt^2+2VB*t
慢车的初速度72km/h=20m/s另车的加速度20*20=2a1*2000a1=0.1m/s2慢车走的位移s1=1/2at^2=0.05t^2另车走的位移s2=20t-1/2a1t^2=20t-0.
如图,从A车站到B车站方向共有线段AC、AD、AE、AB、CD、CE、CB、DE、DB、EB,10条.所以从A车站到B车站方向共有车票10种.故选C.
设小朋友的速度为x那么汽车的速度为Cx20Cx/Cx+x=20-420C/C+1=1620C=16C+16C=4所以汽车的速度是小朋友的4倍
0.3m/s^23m/s^2400000m/s^2
你好列举法画个图很清晰,是六条 如果要计算也容易,每条路从车站到学校,都是两条路去超市那么有三条路,三乘以二等于六条 希望可以帮到你