拉力做功,There is a soft chain of mass M and length L,its 4/5 is set on the smooth table surface,and the remainder is free in air.Then the work done in order to draw the remainder up to table is__________at least.利用外力做功等于系统机

拉力做功,There is a soft chain of mass M and length L,its 4/5 is set on the smooth table surface,and the remainder is free in air.Then the work done in order to draw the remainder up to table is__________at least.利用外力做功等于系统机 a soft It is graceful grief and sweet sadness to think of you,but in my heart,there is a kind of soft I think table tennis is too soft a game.为什么soft提前? A good conscience is a soft pillow.谚语! The toy bear is soft.画soft. it is soft 是什么意思 Drinking a lot of soft drinks isDrinking a lot of soft drinks is bad for our health .的同义句 这道题拉力做功求法 帮我看看这段英语什么意思It is graceful grief and sweet sadness to think of you,but in my heart,there is a kind of soft warmth that can’t be expressed with any choice of words. 我女友Q里发我的It is graceful grief and sweet sadness to think of you,but in my heart,there is a kind of soft warmth can't be expressed with any choice of words! this is my new bedroom.My bed is n_____ to the door .There is a b___ near the window with someinteresting books in it .I have two a _____ :the one next to the window is soft and big ;the other one is hard and small .There is a wardrobe between them . love is simple to understand if you haven't got a mind soft and full of holes it's a crutch that'sall and there isn't one of us does't need a crutch.翻译 that is not too soft 一物体在光滑的水平面上受水平拉力作用移动一段距离,下列说法正确的是：A.拉力,重力都不做功B.拉力,重力都做功C.拉力不做功,重力做功D.拉力做功,重力不做功 Cotton _____ nice and soft.A.is felt B.is feelingC.feel D.feels Cotton____nice and soft.A.is felt B.is feeling C.feels 一根绳子系着小球在空中水平面上做匀速圆周运动,拉力做功吗?A 重力做功,拉力不做B重力不做,拉力做C重力,拉力都不做D都做功,代数和为0