玻璃钢化

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当汽车通过拱桥顶点的速度为10M/S,它对桥顶的压力为车重的3/4,如果要使汽车在粗糙的桥面行驶至桥顶时,不受摩擦里作用,把汽车通过桥顶的速度变为15M/S, 若一个物体的运动是两个独立的不共线的分运动合成的,那么A若其中一个分运动是变速运动,另外一个运动是匀变速直线运动,则物体的合运动一定是变速运动B若两个分运动都是匀速直线运动, Zhalong is the____ (dream) home for birds.适当形式填空 若三角形ABC的两个内角α,β满足tanα*tanβ小于1,判断三角形的形状怎么证明啊 Maybe the word no ture love! “make me fee the love is times can't take away the ture love 费马小定理 p为什么是质数费马小定理中,P一定要是个素数,是怎么体现的?不是素数不行吗? 英语翻译 数学题(sin ) sin()数学题 一道数学题--sin(B)有一道数学题,我实在忘记了,最好有列式,sin(B)*460=sin(175-B)*470求B值.或者说一个三角形,一条边460,另一条边470,此二边条夹角为5度,求另一条边和另二个角. 关于sin求值的一道数学题在三角形ABC中,sinC=√2/2,sinB=(2√5)/5,求sinA 机构工程师怎么翻译 在平面直角坐标系中,点a(1,1),a2(4,2),a3(9,3)a4(16,4).,用你发现的规律确定a9的坐标 某人去年买一种股票,当年下跌了20%,今年应上涨百分之几,才能保持原值 某人去年买一种股票,该股票去年跌了20%,问今年上涨百分之几朝能保持原值 某人年初买了一种股票,该股票当年下跌20%,第二年上涨多少才能保持原值 it's not ture具体是什么意思 It's not real也可以吗 MAYBE IT'S TURE!翻译 Maybe it is ture 是什么意思拜托各位了 3Q 给定一列数a1,a2…a2014,其中,a1=1,且每相邻两项之和等于4,则a1-a2+a3-a4+…+a2013-a2014的值为多少 中心在原点以坐标轴为对称轴,离心率为1/3,长轴为6的椭圆方程是? 某人去年买一种股票,该股票去年跌了20%,问今年上涨百分之几朝能保持原值. HeiLongjiang is in the _____ of China.A.northeasHeiLongjiang is in the _____ of China.A.northeastB.northeasternC.northwestD.northwestern When Walt Disney was drawing one night,he suddenly heard a strange sound.The sound came from the waste basket.Walt looked at it and saw a family of mice eating pieces of bread in it.For many nights,they played there.And Walt began to like them.Walt l 一篇任务型阅读In real life,all of us have friends.We can talk to them,play and go to the cinema with them.But we know that not all of them are real good friends,because simply “A friend in need is a friend indeed”.But why are they still ou 任务型阅读一篇 sinα=m m≠0 求 cosα tanα 的值求cosα和tanα的值(是求两个值) 已知tana=2,求sina乘cosa 长轴长是短轴长的两倍,且过点(2,-6),中心在原点,对称轴在坐标轴上的椭圆方程 完全平方式(-1-a)的平方 展开来是什么?