如题图所示，在粗糙的水平面上，物体A和B之间用轻弹簧相连，在水平向右恒力F作用下，一起匀加速向右运动

ten minutes是单数还是复数? 15 minutes做主语时,是单数还是复数?例如,Surely,15 minutes is enough time for you to have a coffee.这里的be动词为什么是is? minutes做主语,谓语动词用单数还是复数 minuete,这是单数,复数是minutes ,我想请问复数最后面是读iz,还是读s,还是读Z,根据发音规则是,以e结尾的单词只加S,发音IZ 我总感觉这个单词再加IZ发音好像不对,请问是不是对的,懂的帮我回答下 The two boys look very different.In f__,they are brother Those two girls are twins ______ ,they look very differentA although B but C however D because答案给的是C,可句意上理解是C,谁能给出理由 they are twins ,but they look different 用dollars作主语时谓语动词用单数还是复数?我明天英语期末考试! Not all the children like eatingsweet snacks.()of the chidren like eating sweet snscks,()some() They look the same,but do things (different). 在平行四边形ABCD中,AE⊥BC于E,AF⊥CD于F,BC:CD=3:2,AB=EC,求∠EAF. See Through怎么翻译 see through sth 和see sth through的意思． 为什么重力做功的多少与参考平面选取有关呢?是老师讲错了还是我自己不理解?麻烦详细给小生说道说道. See Through 歌词 Three years后面系动词用单数还是复数? many children like eating ___ food Many children like eating h___ and h____d_____ 填空Children usually like eating ( c )very much . My two brothers are twins,but they are _____.A.different B.the same c.the different 质量m的木箱在粗糙水平面上以速度v向前滑,木箱与水平面的动摩擦因数为μ,求木箱加速度及木箱能滑行多远麻烦写下具体过程,这种类型题我不太明白, monkeys like climb trees.(=@__@=)哪里?错了 Monkeus like wo climb trees and eating fruit 这句英语哪有错 Monkeys like climbing trees and eating fruit对划线部分提问 划线部分为climbing trees andeatingfruit 蚯蚓的形态主要具有哪些特点简要说 已知；a,b互为相反数,c,d互为倒数,m的绝对值是2 m的平方-am加【-cd】的2007次方-bm加【ab】的2008次方-3m m=46kg的木箱,木箱与地面间的动摩擦因数μ＝0.2.用一个与水平方向成37度角斜向上的力F拉这个木箱使木箱在水平地面上由静止开始做匀加速直线运动,经5s后速度变为25m/s,求拉力F the elephant eats some fruit 一般疑问句 dogs like eating dones变成一般疑问句 蚯蚓的特点 在rt三角形abc中,角acb等于九十度角a等于六十度,d是斜边ab的中点将三角形abc沿某条直线翻折,使点c落在d上.折合与ac和bc的交点分别为m和n,求角cnd的大小 在三角形中,角c等于九十度,