中国高强度钢自然

Do you pratise▁▁（read）English aloud every morning? do you think it's important of us to read english every morning?哪里有错 2x²+3x+1=0 求x 已知一次函数y=kx+b的图像经过图像(x1,y1)和(x2,y2)两点,且x1y2,那么（）已知一次函数y=kx+b的图像经过图像(x1,y1)和(x2,y2)两点,且x1y2,那么k的取值范围是?为什么?有选项A、k>0 B、k0 C、k 已知正比例函数y=kx的图像上有两点A(x1,y1),B(x2,y2),当x1y2,求k的取 We can read books in the library.(in the library划线)划线部分提问 They are reading books in the library.（就划线部分提问） They can read books and newspapers in the library的意思急 在线等、初二数学题、高手快进、、可追加悬赏!初二数学题： 4）（-2a^3b^-4）^4·(b^3·1/4a^-4)^3今晚就要!明天交作业啊!4）（-2a^3b^-4）^4·(b^3·1/4a^-4)^3 初二数学(2a+b)(-6a-3b)因式分解.接下来怎样化简 6x-（10-x）×3＝42 I can't find Miss Li. Where is she? Maybe she _____(read)in the library.Mary _______(not pick)apples.She ______(hold)the ladder for Jack. Jack is high up in the tree now. （a²+4a）²+8（a²+4a）+16 当X等于多少时,代数式三分之X+1与1减四分之X相等RT He often read books in the library.哪里错了? 30X-17X=156方程的解法 We often read books in the library.(用now改写) 求这个方程的详细解法..X-%30X=3/4 They often read books on Saturday变成一般疑问句! （100-2x）（50-x）=3600 初二数学题a^2+2a(b-c)+2b^2c^2=(?)^2快呀急. Mary ofen reads books in the library.(用now改写句子） Mary ___ ___ books in the library.米娜桑应该知道每条横线填一个单词什么的吧~ No,they read books every day.这个句子的问句请写清楚,谢谢 She reads books She is reading books,She is going read books ,She can read booksShe likes reading book.改为一般问句并做否定会答快我今晚要用She reads booksShe is reading booksShe is going read books She can read books改为一般问 （100-2X）x（50-2x）=3600算一下x=? 30（x+y）=400 80（y-x=400 的解, （X+Y）*30=400 （Y-X）*80=400 解方程组：25（x+y)=400 400(x-y)=400 解这个方程组 32*（x+y）=400 180*（x-y）=400 分解因式：X^4-6X^3+11^2-6X+1 二元一次方程组x*y=1.2 (x-400)*y=0.7怎么解 （X-400）/Y＝0.7　X/Y＝1.2这二元一次方程怎样解呢?