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写出下列物质的化学式：亚硫酸,醋酸,碳酸铵,硼酸,苦味酸,尼古丁. 写出带有“丽”的词语 Who are you.(一般疑问句) 正确!而 who you are 是用于从句中的,如:I don't know who you are.I don't know who you are.是什么从句 为什么从句中的主语要在be动词前面 尼古丁,又叫烟碱,C5NH4-C4H7NCH3 ,请问他是酸、碱.还是盐? 初中了怎样提升成绩因为是初一,第一次月考很重要,希望可以给老师留下好印象.语数外分别说一下方法,特别是数学,求求各位了. mean meaning meaningful有什么区别?请给出通俗详细的辨析,并最好有1—2个例句. Miss Rosi,you are my first foreign nationality teacher.Although,the level of my foreign language is bad.Maybe we have something communication barriers,but you are still responsibile to me,you always so patient with me,and you are always nice to me.I 诗歌囚歌中 “狗洞”指什么 Wow,are u a foreign teacher?Your Chinese pretty 摔婴女孩是哪里人 法语中的漂亮的这个单词 beau,bel,belle （pl.x） 括号内是区别下列各组常见物质的方法,其中正确的是（）A、碳粉和二氧化锰（加双氧水）B、二氧化碳和氮气（用燃着的木条）C、蒸馏水与食盐水（过滤）D、硬水和澄清石灰水（加肥皂水 括号内是区别下列各组常见物质的方法,其中错误的是蒸馏水与食盐水（过滤）.这个是错的.但我不知道为什么错盐不是不容于水吗,不就可以过滤出来 His watch ___ ____ _____.His father fixed it up for him. mean meaning meaningful meaningless区别?用法 英语适当形式填空Father bought him a book on his ( ) birthday.(twelve)理由 The child felt happy because his father bought him a present划线句子是because his father bought him a present 对划线句子提问：The child felt happy because his father bought him a present划线句子是because his father bought him a present My father was surprised _______ the newsA at hearB in hearC hearingD to hear 小明走着走着就死了,怎么回事? 但是这一切都过去了英语怎么写 小明走着走着为啥摔倒了? 为什么小明走路脚从来不沾地?因为他穿着鞋 下列物质不可以用化合反应制取的是 A FeCl2 B NaHSO4 C Na2O2 D NaHCO3 有一天小明走在路上!走着走着突然觉得脚很酸!为什么会这样呢?因为小明踩到柠檬了! 十月社会主义革命之所以首先发生在俄国,其最重要的客观条件是( )A俄国是帝国主义链条上最薄弱的环节 B俄国无产阶级的革命性强 C有成熟的布尔什维克党领导 D无产阶级有农民这个同盟军 I 'll take a short ____by bike.A.travel B.trip C.distance D.jourChinese National Day is coming.what are you going to do?I 'll take a short ____by bike.A.travel B.trip C.distance D.journey 无产阶级社会主义革命为什么首先在俄国发生? 为什么很有必要解释社会主义革命发生在俄罗斯的原因? 为什么有必要解释一下 社会主义革命发生在俄国的原因? 俄国社会主义革命是偶然发生的吗 有一天,小明很饿,于是他就吃了一个巨无霸,问小明叫什么?是个脑筋急转弯.