随着人们生活水平的提高汽车已经走进千家万户,汽车匀速行驶上坡时
来源:学生作业帮助网 编辑:作业帮 时间:2024/04/27 21:15:17
是啊,认可你的想法,交出分来把.
Withmodernsociety'srapideconomicdevelopmentandpeople'slivingstandardsrisingrapidly,itisnolongersatis
(1)由于汽车在行驶的过程中会由于摩擦产生大量的热量,汽车的车圈通常使用铝合金材料,这是因为铝合金和钢相比是导热好、熔点高的合金;故答案为:A;(2)汽车行驶是由汽油在发动机内燃烧产生大量的热量,产生
Withthedevelopmentofthesocialeconomyandtheimprovementofthepeople'slivingstandard.
1、机械能(由于电动自行车运动,具有的能量就是机械能,是由电能转化而来的)2、消耗的电能W=Pt=240w*2500s=600000J=6*10^5J3、阻力f=0.04(m人+m车)g=0.04*1
阻力f=功率P/速度v=50kw/20m/s=2.5kN
Sincereformandopeningup,aspeople'slivingstandardsimprove,cateringconsumptionconceptofmaturity,thesou
settledown安顿下来carriedon贯彻、执行、实施
译为:Withthecontinuousdevelopmentofsociety,people'sstandardoflivingrise,peoplelivinginthecarhasbecomea
Whyaremiddleschoolstudentsnotallowedtodrivealone?Morepeopledrivecarsrecently.Wemiddleschoolstudentsa
Withtheimprovementofpeople'slivingstandard,moreandmorecarsarerunningontheroads.Theincreasingcarscaus
Withthedevelopmentofeconomy,ourlifeisbecomingbetterandbetter.Personalcarsareacceptedbypeoplegraduall
Withtheimprovementofpeople'slivingstandards,thepenetrationofcarsincreased,thegrowingautomotivetechno
A、自行车的轮胎表面做得凹凸不平,增大了接触面的粗糙程度,从而增大了轮胎与地面的摩擦,故不符合题意;B、刹车时,人施加一个很小的力,就可以对车轮产生一个很大的摩擦力,应用了省力杠杆,故不符合题意;C、
Inchina,peopleusuallyusecars.Andeveryyeartherearemoreandmorecars.Manypeoplearelookingforwardtobuying
(1)一氧化碳和一氧化氮在催化剂的作用下能生成二氧化碳和氮气,反应的文字表达式是:一氧化碳+一氧化氮催化剂二氧化碳+氮气;(2)提高空气质量可以从减少废气的排放和增强废气的处理来考虑,常见的措施有:①
withtheimprovementofpeople'slivingstandard
(1)小汽车的重力:G=mg=1200kg×10N/kg=1.2×104N,由于汽车静止在水平地面上,所以小汽车对地面的压力:F=G=1.2×104N,四个轮胎的面积:S=4×500cm2=2000c
中文有错误,应该是:人们的生活日益丰富多彩,而不是生活水平丰富多彩.试译:Withtheimprovementofpeople'slivingstandard,theirlivesbecomerich
其实就那几大公司不断出新产品罢了