2018宝马3系提车作业

数学题,急,马上就要 如图,ad垂直bc,ef垂直bc,∠1=∠2,求证:ab//gf,∠1=∠bad,∠2=∠efc 几何数学题：如图在△ABC,∠BAD=∠CAD,AD=DB,DC⊥AC.求证：AB=2ACfile:///C:/Documents%20and%20Settings/Administrator/桌面/未命名.bmp 如图,已知AD/AC=DE/BC,求证EF=BF 英语翻译In recent years public relations scholars and practitioners alike have expressed concern about the potential for a decline in the status of public relations as women are rapidly Ouu~urnberiIlg men in the field.Athough it is disturbing to 根号8的负一次幂 4(x²+4x-12)/6（x²+5x-6） 求翻译一段英文!如下：Chatter stability of milling operationshas been gaining significant attention with a view to improving the material removalrates in high speed machining of aluminum alloys and low speed milling of difficultt 关于X的一元一次方程 X的2次幂+pX+3=0的一个根为-3,则p=? 如果x+1的和乘x的2次幂减去5ax+a的乘积中不含x的2次幂项,则a的值为几 在X² +PX+8与X² -3X+Q的积中不含X的三次幂与X项,求P,Q的值 3分之x的2次幂减2X加3的常数项 如果代数式5x+Ax+B与代数式－Cx²-4x-2006同为某几项的和,那么A,B,C的值分别为谁么? 英语翻译The commercial availability of low-cost,Auto-ID Center standards-based RFID systems by mid-2003 has poised these systems to be one of the earliest and perhaps most explosive opportunities in ubiquitous computing.As these systems leave the 3×(-2)的三次幂-4×(-3)的二次幂＋8 4分之3+4的二次幂分之3+4的三次幂分之3+4的n次幂分之3的和是多少? 英语翻译But in Italy,a nation that takes fashion very seriously,the suggestion caused a debate among parents,teachers and students.The issue is whether the headmaster's request will limit students' freedom— or whether dress in Italian schools i 解方程时,不需要合并同类项的是 ( ) A 2x=3x B 2x+1=0 C 6x-1=5 D 4x=2+3x 选B为什么 解放程时不需要合并同类项的是（）A.2x+1=0,B.2x=3x,c.6 -1=5,d.4x=2+3x 若n阶矩阵A满足A^3=3A（A-I）,试证I-A,并求（I-A）^-1 分数幂 a^-b等于a^1/b吗 八位表示,x=-69,y=-18,用补码求x+y,采用双符号位结果是不是会溢出! x的补码是1101,y的补码是0010,则x－y的值的补码为多少（x和y都是用4位二进制表示的有符号 x补码1011,y补码0010则x-y的值的补码 若|x-1|+(y+1)的平方=0,则x的2009次幂+y的2010次幂= 2的2010次幂+负2的2011次幂.结果. 负2的2010次幂 加 负2的2011次幂 甲乙丙同时给100盆花浇水,已知甲浇了78盆,乙浇了68盆,丙浇了58盆,三人都浇过的花有几盆? 三人同时给100盆花浇水 甲浇了78盆 乙浇了68盆 丙浇了58盆,那么三人都浇过的花至少多少盆? 三人给100盆花浇水,甲浇了78盆,乙浇了68盆,丙浇了58盆问三人都浇过的有多少盆? 三人给60盆花浇水,甲浇了38盆,乙浇了50盆,丙浇了40盆问三人至少都浇过的有多少盆? 甲,乙,丙给100盆花浇水,甲浇了76盆乙浇了69盆,丙浇了85盆,至少有多少盆花浇了3次水? Volunteering give you a chance (to change) lives,including your own 我想问为什么用：to change而不是用：changing to+动词原型表示“将要” 我想问：在翻译的时候,用不用把 “将要” 的意思翻译进去