淀粉碘化钾试纸原理

I think it is not necessary.还是I do not think it is necessary啊那一句对啊 Although he has ___40,he still think it is necessary for him to master EnglishA.gone B.turned C.becomed D.entered 为什么? 30℃时,250克水中最多溶解114.5克硝酸钾,求30℃时硝酸钾的溶解度 The man is sitting on the sofa is my uncle.在man 后边加一个什么单词?急 急 急 sitting on the sofa,my father was reading the news-paper.seated on the sofa,my father was reading the news-paper.哪个对?为什么?还有人知道吗? 怎么写? 硝酸钾溶解度快慢的因素的实验探究 怎么写啊 这怎么写 怎么写啦 急 包子用英语怎么说?o(>_有复数吗 怎么表示什么馅的 (>_ 人类的平均智商是多少,最高智商又是多少,都是怎么测试的呢 绅士用英语怎么说?O(∩_∩)O谢谢 人类的智商平均是多少?拜托了各位 谢谢 用所给词的适当形式填空.1 What ( ) your father ( ){do} now,Ann?He's reading a book.2 Please ( ){take} your ball away.3 Here is your eraser,Tom.( ){thank}very much.4 You must do it ( ){ careful}.5 I think the juice is ( ){she}.6 Can you look 补全下面的对话 问：( )( )your father 答：he likes reading a book my father is reading a book.改成一般疑问句和特殊疑问句 is your father a book or tva read watchb reads watchesc reading watching A secret makes a woman woman用拼音或什么让我看明白 中间那个字怎么读,上面一个合,下面一个羽 “上面一个如,下面一个生”这个字怎么读? 人类的智商是多少? 上面四字头,下面且字怎么读 字头是四上面的,下面是个思字,在病历上出现的字, 七年级英语;My father’s brother is my u________ .My brother is my father’s s________ .根据句意及首字母提示填空 My father‘s brother is my cousin.有什么错误 女孩子傻乎乎,笨笨的用什么词语来形容比较好.如题或者用简短的句子 ,最好有点新意。 设集合A={x│ | x - a | < 1,x ∈R},B= {x │ | x - b | > 2 ,x ∈R },若A包含与B,则a、b必满足（ ）A、| a+b |≤ 3 B、| a+b | ≥ 3 C、| a - b | ≤ 3 D、| a - b |≥ 3思路是怎样的? 求问一道高中数学题,麻烦各位朋友们帮忙指导下~有纯农药液一桶,倒出8升后用水加满,然后又倒出4升后再用水加满,此时桶中所含的纯农药液不超过桶的容积的28%.问桶的容积最大为多少升?下 解释几个新词雪藏（有两个）蒸发（不要原有的意思）甩卖月光族 海洋最深处有什么 海底最深处有什么