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数学次数和指数是什么? 什么是次数,什么是系数?讲的详细点吧、最好举几个例子.因为前天感冒,落课了,没有人讲解,数学书上的一堆我都看不懂呐- -坐等,好在追分. 数学指数和次数是什么意思? My mother will （go shopping ）this afternoon 对括号提问 1.I suggest_______(go) shopping this afternoon.2.Do you enjoy_____(watch) TV 3.We dislike _____ (read) long articles.4.Stop ______(shout),it's time for class.5.I have finished ___(write) the composition.6.Do you mind my /me_______(smoke) here 7.They Let's go shopping this afternoon.(同义句改写）要 _____ _______ going shopping this afternoon?的句式 ∫∫ |xy-1| dxdy D= 0≤x≤2 0≤y≤2 绝对值打开后 怎么写分段函数?答案是：3/2+2ln2 Let‘s go shopping this afternoon?(改同义句）（ ）（ ）going shopping this afternoon? Y=|x+1|+|x-1|去掉绝对值的分段函数式? 2号选手共抢答8题,最后得分64分.她答对了多少题?（答对一题加10分,答错一题扣6分） what about ( ) basketball this afternoon?A.to play B.playing C.play What about play football this afternoon有一处错误,是哪 I want to go shopping this afternoon,what about you?A.so Idid B.so i do C.so i did D.so do i (I don't know choose which,please tell me why?) Would you like to go shopping with me this afternoon?请问这句英语有没有错. 电灯泡的瓦数为a瓦时,t小时（h）用电量为1000分之at千瓦时乘以h,如果一只25瓦时的的灯泡平均天用电3h,那么每月（按30天来计算）用电多少,列式子也行,能说过程最好列 4位LED共阴极数码管驱动我采用4位共阴极LED,MY3641AH和LG3641AH都用74HC245驱动,现在存在以下问题：MY3641AH用74HC245驱动则不亮,改用74LS245驱动,则电源发热严重,限流电阻位330欧；LG3641AH采用245 都没有 一千克力乘以一米除以一小时等于多少瓦 如何根据这个电路图判断数码管共阴极还是共阳极 电路图里如何区分数码管是共阳极还是共阴极?比如上图,是共阴还是共阳呢? 数码管共阴极应用电路这个电路对吗?怎么数码管不亮?不知道是不是数码管的问题,数码管是四位共阴极的 这个共阴极数码管显示电路对吗? ()you!I have time this afternoon? Would you like to go shopping ()me? 二、 词汇与语法知识 20.—— Would you like to go shopping with me this afternoon —— __________ .A.No way .I’ll do my homework B.It’s a pleasure C.Well ,I fell like staying at home D.I have no time ——今天下午你同我一起 七段数码管共阴极与共阳极怎么区分 共阴极LED数码管和共阳极LED数码管在接线上有何区别?急!求知识帝 LED数码管哪个脚是阴极哪个是阳极是公共端3或8接正极就是正极 接地就是阴极了吗 其他与单片机相连的是正极还是阳极啊 小弟我很白啊 怎样检测单色式LED数码管(8*8)是公阴极还是公阳极? 现在急需要.要简便计算的过程,可以写到纸上照下来 椭圆的数学题 椭圆的数学题椭圆X2/25+y2/16=1的左右焦点分别为F1,F2,弦AB过F1,若三角形ABF2的内切圆周长为∏,A,B两点的坐标分别为(X1,Y1)和(X2,Y2),则│y1-y2│的值为 Could you tell me ______ during Earth Hour on Mar.31st this year?A.where were you B.what you aB.what you are doing C.who you stayed with Where will you go this year?的意思