IIF(51=51,88888,1/0)

一辆列车总质量为M,在平直轨道上以速度v匀速行驶,突然质量为m的车厢脱钩.假设列车所受阻力与质量成正比,牵引力不变,当车厢恰好停止时,前面列车的速度有多大? famous for;famous as;popular with;popular among的区别Our Chinese teacher is more ________ a writer.A. famous for B. famous asC. popular withD. popular among请大人具体说说这4个选项的区别 谢谢回答 暖宝宝 如何用 暖宝宝怎么样? 南亚某国是哪个国家 南亚现在有几个国家,分别是哪几个? 1.Look at these (colour) clothes.They are really nice.2.We (clap) our hands while the guards (march) across the road.3.I'm sorry I can't stop (talk) with you.I have much work to do.4.Where’s Tom He (go) to the library.5.There is (end) homework to d ( )the clothes line填什么介词? look ______ these clothes ,they are _____...______ ____ is jim(撇s) sweater?it is blue.are these接着上面的mr green(撇s)yes,___ ____ what color _____they?they are black.____skirt is this?it is kate(撇s) what color is it?it ,is red.it is___ ___ The Old Town of Lijiang is __ with tourists forThe Old Town of Lijiang is __ with tourists for its beautiful buildings.A.popular B.famous C.special D.different 请指教哈 与中国相邻的南亚国家有哪几个 After graduation,he went to work on a farm.同义句 After ____ ____ ,he went to work on a farmI have mastered English by learning it all by myself.__ __ __ English I have mastered it. he went on working to eleven last night与he went on to work to eleven last night哪一个正确? 长江三角洲发展潜力大的原因 从自然地理环境考虑,长三角地区经济进一步发展的限制因素是什么?. 长江三角洲发展的优势条件是什么?A地势低平 B集黄金水道和黄金海岸的区位优势于一体 长江三角洲发展农业的不利条件同问 长江三角洲地区旅游业发展共同优势条件, 硝酸铵燃烧热 我刚买了个小熊的电蒸锅,三层的,但是上面都是塑料的,对身体有害吗? 溶剂染料含重金属吗 船舶目的地写armedsecurityonboard是什么意思 2.________ will spend the summer holiday in Hawaii.A.She,you and I B.You,she and I C.I,you and she D.Her,me and you 有的人介绍往往会说这是我的条船是什么意思 船公司代理单是什么意思 溶液中未电解的离子是否属于溶液中离子浓度如题:HA和NaOH等体积等浓度混合.得到PH大于7的溶液那么溶液中A离子的浓度和Na离子浓度大小比较.正一价和负一价打不起,你明白就行.我知道NaA是 为什么用控制阴极电位电解法,可用于电解分离,并能准确测定某种金属离子在溶液中的含量? These clothes are____(they) 一定温度时,硝酸铵溶液的溶质的质量分数为百分之50,取84克这种溶液要是它达到饱和要加多少固体硝酸铵? 如图所示,烧杯和试管内分别装有不同的液体,当用酒精灯不断给烧杯内的液体加热时,最终发现烧杯和试管中的液体都沸腾了.为什么?A、烧杯的液体沸点比试管的液体沸点高、B、烧杯的液体沸 将50克10%的硝酸铵溶液加入10克硝酸铵后的质量分数 船的V排是什么?船上浮是因为它排开水的重力等于它的重力,浮力＝重力.那它排开水的体积是哪一部分?船它本身的密度比水大啊...