Onedaysomethingwentwrongwithaman’sbicyclechain(链条).Themancouldnotrepairitsohelooked1forhelp.Theonlyhousenearbybelongedtoawomanwhohad2thereafewmonthsearlier.Themanknockedatthedoorbutthewoman
One day something went wrong with a man’sbicycle chain(链条).The man could not repair it so he looked 1 forhelp. The only house nearby belonged to a woman who had 2 therea few months earlier. The man knocked at the door but the woman did notanswer. The door had clear glass in it and the man 3 seethat the woman was home. He decided to knock again. Finally the woman came tothe door. The man immediately explained his 4 .“I can fix the chain ” the woman said. Later when the bike was 5 togo the man said ‘Thanks. I hope I can help you some day.” “I never needhelp ” the woman said.
The following week the man was riding hisbike 6 he noticed the woman walking
down the street. A strong wind suddenlylifted(拾起) her hatand sent it into the branches(枝) of an old tree. The woman tried to get her hat with a stick butshe failed. She seemed 7 because sheclearly was not dressed for tree-climbing. The man hurried over quicklyclimbed up to the hat and 8 it intothe woman’s waiting hands. When she put on her hat she 9 theman as he climbed back on his bike. ‘I think I told you I never need help ” thewoman said “I’m glad you didn’t 10 me.Thanks.” Then they both smiled.
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为什么计算链条节数时会出现半节链条的情况两个链轮之间距离为206mm链轮分度圆直径为Φ56.35链 2020-04-27 …
Onedaysomethingwentwrongwithaman’sbicyclechain(链条 2020-05-15 …
Onedaysomethingwentwrongwithaman’sbicyclechain(链条 2020-05-15 …
Onedaysomethingwentwrongwithaman’sbicyclechain(链条 2020-05-15 …
Onedaysomethingwentwrongwithaman’sbicyclechain(链条 2020-05-15 …
Onedaysomethingwentwrongwithaman’sbicyclechain(链条 2020-05-15 …
将长为L的均匀链条,放在高2L的光滑桌面上,开始时链条的一半长度处于桌面,其余从桌边下垂,从此状态 2020-07-07 …
如图,自行车每节链条的长度为2.5cm,交叉重叠部分的圆的直径为0.8cm.(1)4节链条长cm; 2020-07-20 …
用一串链条连接三个齿轮A/B/C,已知齿轮A有23个齿,B、C齿轮各有46个齿,链条有85节,在链条 2020-11-08 …
23.一小定滑轮距地面高刚好为一链条的长度L,有一个人用轻绳跨过滑轮系住链条的一端,用力将全部堆放在 2020-12-25 …