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在三杯稀硫酸中分别加入铁,铝,锌.溶液的pH一定增大吗?为什么?还有5 mon/L，所以其PH值，无法判断是增大了。这句话怎么理解？ (a+b-c)-m(b+a-c)因式分解KUAI a(m-n)-b(n-m)+c(m-n)因式分解 急. FedEx Ground 和FedEX International的区别是不是前者只能在美国本土范围内派送? 这句话怎么翻译好~Comparative Perspectives of International Freight Forwarder Services in China I swear my love that you're everlasting这句话什么意思? love you more than an ugly goddess oh i swear it" It will all be worth it 为什么要用be worth ?worth是动词吗? bodybuilding motivation all worth it背景音乐 速求 蝴蝶符号怎么组合的?Ƹ̵̡Ӝ̵Ʒ 绯月的蝴蝶的符号怎么拼?谁知道? 在一只密闭容器内有四种物质,在一定条件下充分反应,测得反应前后各物质的质量如下表：物质 X Y Z Q 反应前质量/g 8 2 40 5 反应后质量/g 待测 24 8 23 下列说法错误的是（ ）A．该反应可能是分 ride the wave 具体怎么用 a wave 如题 现存生物进化趋势 ride the wave I think any historian would agree that syudying the groups of people who rode the wave of Gutenberg's invention is secondary是什么意思? 英语翻译The U.S.economy is thriving (兴旺) on technology,and tech stocks (股票) have boomed (兴隆).In 1999,tech stocks more than doubled in value,and Internet stocks did even better.However the Dow rose just 25 percent,and shares of compani How many pupils are there in your class 怎么回答 How many ______ are there in your class?A：Japanese B：American C：Australian D：Canadian come的现在分词是什么? 除了英语和汉语,哪门语言学起来相对容易,而且实用呢? come up“被提出”中的come是原形还是过去分词? 用所给词的适当形式填空：How many _______(moman)are there in the room come现在分词 有人知道像蝴蝶的这个标志怎么打么? many windows are there in your room?的句子结构怎么划分? yy蝴蝶符号怎么打? 烃基降冰片烯是什么东西,给出分子式结构式 《望九华》王十朋 是文言文 what does your teacher do inapril?回答应该是April 打扑克牌时大王能和小王一起出么打娘娘 为什么扑克会有大王小王?