can+bring+about

潘茂先1764写一篇题目为《Lucky++number++can++bring++good++luck?》的英语作文?一百二十个单词的作文 -
索唐逃18034509892 ______ Some people take it for granted that some lucky numbers can bring them good luck. For instance, the so-called lucky number “8” is widely used now because it is sounded like “getting rich” in Chinese and is believed to bring good fortune. Yet ...

潘茂先1764It+can+bring+you+good+luck++中的+good+luck++做甚么语
索唐逃18034509892 ______ 句中goodluck是bring的直接宾语,间接宾语是you这个句子是含有双宾语的句型

潘茂先1764高中不等式中,有一常用不等式是ab≤[(a+b)/2]²或ab≤(a²+b²)/2. -
索唐逃18034509892 ______ 两个不等式都对,在不同的情况下使用,只不过确定的ab的范围不同,比如说ab=3,可能[(a+b)/2]²的值为4,(a²+b²)/2的值为5,都是成立的 PS: ab≤[(a+b)/2]²和ab≤(a²+b²)/2都是由(a-b)²≥0推导出来的,但[(a+b)/2]²≤(a²+b²)/2

潘茂先1764can be +过去分词 +by 是什么的被动语态.我还不明白 不要复制 -
索唐逃18034509892 ______ 主动与台表示主语是动作的执行者、而被动语态主语是动作的承受者、 Eg: He broke the window.(主动) 他打破了这扇窗户. The window was broken by him.(被动) 这扇窗户被他打破了.还有,不及物动词不能用于被动语态、 这些都是我们上课讲的,笔记本上记得、

潘茂先1764逻辑代数的分配律A+BC=(A+B)(A+C)怎么证明? -
索唐逃18034509892 ______ (A+B)(A+C) =AA+AB+AC+BC =AA+A(B+C)+BC =A+A(B+C)+BC =A(1+B+C)+BC =A+BC

潘茂先1764can't be+v must be+v怎样表示,过去式呢,过去完成的呢? -
索唐逃18034509892 ______ couldn't be 不可能不能够 couldn't have been 过去不可能做过如I couldn't have said that .我不可能说过那样的话 must be 一定(Somebody is knocking at the door.It must be Tom有人在 敲门,一定是Tom) must have been过去一定做过(It must have been rained last night,beacuse the ground is wet.昨晚一定下雨了因为地面湿了)

潘茂先1764逻辑函数A+非AB怎么等于A+B -
索唐逃18034509892 ______[答案] A+ ┐AB =A(1+B)+┐AB =A+AB+┐AB =A+(A+┐A)B =A+B 满意请轻戳此处 ↓

潘茂先1764(1)式子a/bc+b/ca+c/ab的值能否为0?为什么?(2)式子a - b|(b - c)(c - a)+b - c|(a - b)(c - a)+c - a|(a - b)(b - c)的值能否为0?为什么? -
索唐逃18034509892 ______[答案] 第一题:不能,假设原式为0,即a/bc+b/ca+c/ab=0,两边同时乘以abc得:a平方+b平方+c平方=0,仅当a=b=c=0时成立,把值带入原式则分母为0无意义,所以不能为零! 你的第二题看不懂你补充下我用别的号回答,别忘了给我分哦

潘茂先1764a^5 - b^5怎么变成(a - b)(a^4+a^3b+a^2b^2+ab^3+b^4) -
索唐逃18034509892 ______[答案] 原式=a^5-a^4b+a^4b-a³b²+a³b²-a²b³+a²b³-ab^4+ab^4-b^5 =a^4(a-b)+a³b(a-b)+a²b²(a-b)+ab³(a-b)+b^4(a-b) =(a-b)(a^4+a³b+a²b²+ab³+b^4)

潘茂先1764who+can+sing+a+birthday+s++++++s后面填甚么
索唐逃18034509892 ______ song 名词,.意为歌曲的意思...who can sing a bierthday song 意为谁会唱一首生日歌...