天海一线还是海天一线

matlab怎么把一组已知的点画在坐标图上?x = { 0,5,10,15,20,25,30,35,40,45,50,55 };y = { 0.0,1.27,2.16,2.86,3.44,3.87,4.15,4.37,4.51,4.58,4.02,4.64 AB为圆O的直经,C为圆上一点.证明角ACB等于90度 The foolish man seeks happiness in the distance,while the wise grows it under his feet.怎么翻译? 请帮我翻译一下这句话：one study found a correlation of just .12 between income and happiness. Over the Water 歌词 1.填表 单项式 2a^2 -1.2h xy^2 -t^2 -2ut/3 系数 次数这是5个数：2a^2，-1.2h，xy^2，-t^2，-2ut/3各求他们的系数和次数 ①2a² ②－1.2h ③ xy² ④－t² ⑤－2ut/3 求这几个数的系数和次数 和翻山越岭,前赴后继相关的词有哪些? 设x=3是函数f(x)=(x^2+ax+b)e^(3-x) 的一个极值点..(1) 求a与b的关系式（用a表示b),并求f(x)的单调区间为什么x=3是极值点,则函数倒数=0中x1≠x2? 证明e^x大于2x? 英语选择题Susan () fruit after dinner.A.eat B.have英语选择题Susan () fruit after dinner.A.eat B.have C.eats 证明：e∧x－x²－2x-2＞0 谁能帮我证明一下e∧x－x²－2x+2＞0, y＝0是一元一次方程吗?请说明理由 ___these books were offered to the Project HopeA.two hundred B.two hundred of为什么用B不用A y=0是不是一元一次方程 over these tombs huge stone pyramids were built.这句话中huge stone为何要放在over these tombs后面像这样的放法会不会语法错误,请知道的朋友祥解, 证明当x>0时,2x^1/2 > 3-x^-1急 y的平方减7等于0这题怎么解方程 i thank it's ok to have some_____(difference)between friendsrt 反思是什么意思,怎么写? i can see some difference between the two pictue为什么differece不加s 0.81x^2的完全平方形式? 81x平方-405x+486=0 满足x-y≤1,x+y≥1,y≤3/2,则2x+y的最大值是 若x^2+2x-y-3=0,则x-y的最大值是 已知x,y满足约束条件1 Baby是啥意思! 求过点(-2,5)且与圆(x-2)^2+(y+3)^2=16相切之切线方程 高等数学中以参数形式表示的圆的参数切线方程一个圆：x=cost,y=sint,圆周上任一点的切线斜率为dy/dx=-cott,切线方程为y=-xcott+1/sint,这是怎么求出来的? 英语翻译Over The Water— The CardigansWords:SveningssonMusic:Svenssonturn away and the collarbecause the blowing is drywalk away to the harbourbefore your ships will flyslip away and the pillowbecause it's falling of downtrot away and aroundbeca The water_all over the desk空里添什么