价值增殖过程

一个两位数字,十位数字是x,个位数字是x-1,把十位数与个位数字对调后,所得到的两位数是（ ） 用所给动词的正确形式填空He should __(do)his homework first PpR管S2能承受多少压力 He did his homework yesterday evening.(变为一般疑问句）如题.急死了! 同样压力的情况下50的PPR管可以带几根32的PPR管?怎么计算的 "He did his homework."改为疑问句,老师给的答案是：Did he do his homework?可我觉得“do”的后面不应该加上es吗？“he"是三单啊！ He must do his homework.改成一般疑问句 三个数相加得八有几种 一个数与它自身分别相加.相减.相除,和.差.商相加的和为8.6.这个数是多少? 家装水管是采用铝塑的好还是PPR水管好那?我家准备装修,水管是暗埋的,但我不知道冷热水管是用PPR管好还是用铝塑管好, l have a lot of homework____(do)today这是用所给动词的适当形式填空 铝塑管好还是PPR管好? I have a lot of homework to do today(改为同 义句） I have a lot of homework to do taday.改写成一般疑问句 ( ) you have a lot of homework to do today?A.shall B.will C.do D.are 1.we have （） （lots ,of,a lot ）homework do today. 从1、2、3、.、2006这2006个数中,选出两个数相加,使它们的和大于2006,有几种选法 联塑水管是绿色家装管好?还是联塑白色水管好? Tony does his homework at school.改为一般疑问句 yang xiang did his homework at school yesterday afternoon改为一般疑问句 He has to do his homework at school 变否定 my brother does his homework after school.(改为一般疑问句) 任意三个数字,可以排列出多少组三位数?其公式是什么?假如其中一个数字固定,又能组成多少组?公式又如 家里要装修……选水管,求ppr水管品牌十大排名家里要采购水管了,工头推荐的伟星,有时排第二,有时排第三? 谁知道2013年十大家装水管品牌有哪些?PPR十大名牌1.PPR管10大品牌_金德(中国名牌.中国驰名商标.国家免检产品.十大水管品牌)2.PPR管10大品牌_伟星(中国名牌.中国驰名商标.国家免检产品.十大水 2013年家装十大水管品牌有哪些?谁知道? 反意疑问句he does his homework everyday,they are teachers,she can dance,tom isn‘t reading a magazine,they cleaned the classroom yesterday aftenoon, He has no time to do his homework,--- ----?反义疑问句 家装水管选什么牌子的PPR水管好那?买了新房子,水管选择很重要,想要搞装修,到底该选什么牌子是好,有人推荐用金德伟星牌子的,可是他们都太贵,有没有质量好又实惠的PPR水管牌子?请大家推 家装水管用哪个牌子的PPR水管最好?买了新房子,水管选择很重要,想要搞装修,到底该选什么牌子是好那,有人推荐用金德、金牛、日丰、伟星,可是名牌的太贵,有没有质量好又实惠的水管牌子? The weather in 广州 in summer is much hotter than （ ）in 沈阳.写什么?原因? The weather in Guangdong is hotter than____in Beijing.A.it B.that C.one