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一个两位数,十位数字是个位的2倍,将个位数与十位数交换得到一个新的两位数,这两个数的和是132求原来的用方程, ppr管材试压多少压力算合格? 通甲醛的管道用PPR管材可以吗?压力没多大要求,能不能经得起腐蚀? how,what,how a,what a,感叹句的用法最好有例句 把 what bad weather 变成how打头的感叹句 有10位数的手机号码吗 手机号码有没有十位数? 谁知道有没有十位数的手机号 例如1872444013 +7字开头的十位数电话号码是哪里的?+7754572288是哪里的电话 He does his homework every day .(改为否定句和疑问句) He does his homework,改为一般疑问句 He does his homework after supper.改为疑问句 和否定句疑问：Does he does his homework after supper?否定：He doesn't his homework after supper. he often does his homework at home 变否定句和疑问句 Tom does his homework at home变一般疑问句,否定句,划线提问 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?