放大镜的工作原理

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放大镜的工作原理
在直角坐标系中,直线y=kx+4与x轴交于点A,与y轴交与点B,已知△OAB的面积为10,求这条直线的解析式. 我来自物流管理2班,怎么翻译成英文 写自己的诚信故事, 英语翻译For out in the ocean stands the castle of the Sea King.Its walls are builtof coral,and the long,gothic windows areof the clearest amber.The Sea King hadsix beautiful children;but the youngest was the prettiest of them all;but,like all the 英语翻译None of longed so much for her turn to come as the youngest,she who had the longest time to wait ,and who was so quiet and thoughtful. the Little Mermaid这是哪个国家的 小美人鱼 THE LITTLE MERMAID怎么样 寻求the little mermaid 英文完整版,只需英文. 3x+y=9的所有正整数解 3x+y=6;2x+y=9.解二元一次方程组,直接写答案. 20mlCaCl2溶液加水稀释至100ml,稀释后的溶液中Cl-离子的物质的量浓度为1mol/L,则稀释前CaCl2的物质的量浓度为 ( ) A.0.3mol/L B.5mol/L C.0.5mol/L D.0.6mol/L 把1mol/L的NaOH溶液1/20mL滴入100mL水中,如果稀释後形成的溶液仍看作为100mL;试求其pH值.您可在这里继续补充问题细节 生活中的诚信故事,今天就要100字左右,把自己的看法和意见也写一下,我要2个 我要现实中发生的诚信故事啊, 英语进行句型转换1.I’d like some peppers.(改为否定句) 2. Do you like pandas?Do you like dolphins?(改为选择疑问句) 3. I went to a movie with my parents.(改为一般疑问句) 4 我想你,转换成英语怎么写? 好男人一生都离不开玩具英语怎么说 七年级上册数学书148页11题答案 老张与老李购买了相同输了的种兔,一年后,老张养兔数比买入种兔数增加了2只,老李养兔数比买入种兔数的2倍少1只,老张养兔数不超过老李养兔数的三分之二.一年前老张至少买了多少只种兔? 七年级下数学书148页第7题怎么解?人教版的 -根号3x根号1/27(5-根号3)平方+(1+根号3)(根号3-8)-根号3 乘 根号1/27 根据你的要求,英语怎么说? 苏教版七年级数学下学期补充习题答案 苏教版七年级数学下册补充习题P36计算题直接写答案~关键第六题,我做好了想对一下- 如图,AB=a,P是线段AB上的一点,分别以AP、BP为边做正方形。1、设AP=X,求两个正方形的面积之和S(用含X 苏教版数学七年级上册补充习题39页 Most people make their living with their hands But Jonh makes his living with his feet.And it is a very good living,too.John's story began in a very small city in England.His parents were very poor.Seven people lived in their small house.John had no 谁能给一些定语从句的练习?我现在上初中如果好的话我有重赏哦!还有最好多一些是用"whose,whom"的题目,这是我的最最最弱项了!我上的是初中只要"that,who,which,whom,whose"这些答案的题目. 稀释氯化钠为什么倒9.7ML的5%氯化钠,在加40ML的蒸馏水?稀释氯化钠为什么倒9.7ML的5%的氯化钠溶液,再加40ML的蒸馏水?这是要配制1%的氯化钠溶液啊....为什么不是倒10ML5%氯化钠溶液呢? 在反比例函数y=x分之5k-20图象的每一条曲线上,y随x的增大而减少,求k的取值范围. 小学英语阅读选择题. Most children like to watch TV.It is very interesting.By watching TV they can see and learn a lot and know many things about their country and the world.Of course,they can also learn over the radio.But they can learn better and more easilywith TV.Why "Culture shock" occurs as result of total immersion in a new culture.It happens to "people who have been suddenly transplanted abroad.” Newcomers may be anxious because they do not speak the language,know the customs,or understand people's behavior 直线y=-x+2和双曲线y=-3/x相交与A.B两点,则三角形oab的面积多少