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如图,（1）求证：∠BDC=∠A+∠B+∠C； （2）如果点D与点A分别在线段BC的两侧,猜想∠如图,（1）求证：∠BDC=∠A+∠B+∠C；（2）如果点D与点A分别在线段BC的两侧,猜想∠BDC、∠A、∠B、∠C这四个 点D在∠BAC内部,并且在直线BC右侧时,探索∠BDC,∠B,∠C,∠A的关系.说明理由 （理） 已知函数f（x）在[0,正无穷）上是增函数,g（x）=f（|x|）.若f（x）=lgx,则.（理） 已知函数f（x）在[0,正无穷）上是增函数,g（x）=f（|x|）.若f（x）=lgx,则g（lgx）>g(1)时x的取值范围是多少 please translate this sentence?Peters is quoted as saying "In my acr,as much as I try to make it look like we all think and talk so differently ,the point is ,we all do the same thing! 证明函数f(x)=lgx+x-2在（0,+∞）上是增函数,并写出零点存在的一个区间 please help translate this sentenceIt is each employee's personal responsibility to bring violations or suspected violations of the UTC Standards of Conduct to the attention of their supervision,the legal department of their operating entity,or to th please translate this sentence for me.there was surely a spirit of intensity everywhere that made for short effort. try to translate this sentence pleasemessage instantly and anywhere.即时短信无处不在? is it right that i have translated to?(这个后面我自己加了个to.感觉自然而然就加上去了,对不?自己理解是to that sentence. Translate this sentence in English,please“我将会变得越来越强”用英语翻译可不可以译为"I will be more and more stronger"? 一卫星绕地球做匀速圆周运动 ,运行轨迹距离地面高度为h,已知地球半径为R,地球表面重力加速度为g不考虑地球自转的影响求1卫星的线速度 2卫星绕地球做匀速圆周运动的周期 有一分段函数x=-1 f(x)=-x^3-x+2,则满足f(x^2-1)>f(x+5)时,x的取值范围? 芒果是什么形状 描写芒果外表的句子 我喜欢的水果----芒果从外形、颜色、味道、最后写感想几方面写(150字）左右 若根号(x的立方+3倍x的平方)=-x根号(x+3)成立,求x的取值范围 已知地球质量为M,半径为R,地球表面的重力加速度为g,引力常数为G,有一颗人造地球卫星在离地面上高h处(该处重力加速度为g)绕地球做匀速圆周运动,那么这个卫星的运行速率为 （ ）A、√（GM/ 一颗人造地球卫星离地面高h=3R（R为地球的半径）.若已知地球表面的重力加速度为g求卫星做匀速圆周运动的速度.角度度.周期. please help me to understand this sentence (260)The television show 60 Minutes once ran an episode on some decrepit manufacturing plants in England. 一颗人造地球卫星离地面高h=3R(R为地球半径).若已知地球表面的重力加速度为g,则卫星做匀速圆周运动的速度是,周期是,若已知地球质量为M,万有引力常量为M,万有引力常量为G,则卫星做匀速运 please help me to understand this sentenceMany people are disturbed to learn that present-day paper money is neither backed by nor convertible into anything more valuable-that it consists of nothing but pieces of paper whose value derives from common please to help me to understand this sentenceIn recent times feminists and aboriginals often have a hard time with economic principles because of the reluctance of economists to assume men and women or natives and non-natives are fundamentally differ please help me to understand this sentence(133)George is trying to get a new paartment in his building which is rent controlled.Those in charge of renting the room out are going to give it to an old man because he survived a ship sinking at sea.Georg please help me to understand this sentence(130)When markets work well at allocating goods, preventing the market from working by restricting the movement of prices will lower the total gains from trade. 已知命题p:x1和x2是方程x^2-mx-2=0的两个根不等式a^2-5a-3>=[(X1-X2)的绝对值]对任意实数m属于[-1,1]恒成立,命题q：不等式ax^2+2x-1>0有解,若命题p是真命题、q是假命题,求a的取值范围 为什么|x1-x2|=√(m^2 已知命题P:x1和x2是方程x^2-mx-2=0的两个实根 不等式a^2-4a-2>=lx1-x2l已知命题P:x1和x2是方程x^2-mx-2=0的两个实根,不等式a^2-4a-2≥lx1-x2l对任意实数m属于[-1,1]恒成立;命题Q:只有一个实数x满足不等式x^2+2 用宽字组成恰当的词语填入下列句中的括号里! 求行列式 a b .b b a .b ...b b b .a 设随机事件AB相互独立,已知只有A发生的概率是1/6,只有B发生的概率喂1/4,求P（A）? 根据具体语境解释下列句中括号的词语.1.民族生命的进程,其经历亦复如是（亦复如是）2.旦辞黄河去,暮至黑山头.（辞）（去）3.我看见这些情形,正在诧异（诧异）4.对于关东原野,我们心里 地球半径是R表面的重力加速度是g卫星在距离地面高R处做匀速圆周运动时 好像是一个形容词 生命就像一（量词+形容词+的+名词）,（形容词）最后一个形容词要是成语多来几句