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mc34063A我想用这个块升压从输入3.7-4.2升压到9v可升压后带负载能力太差电路 结构是这样下图那样 本人经过详细计算后,发现后端带负载能力非常差,前端消耗非常严重,这到底是那的毛病 带负 地质学中有涉及极限思想的吗?有没有极限思想在地质学中的应用案例?不用说的太详细 大概给个方向就行 我是数学系的.要写极限思想在地质学中的应用.地质学一点不会伤不起啊! 未来的气候地质学或古气候学研究会发现今天的大气污染吗? 中国古代地质学的萌芽有哪些? 我该放弃人工授精去做试管吗? 家里的被芯是长7尺,宽6尺,8斤重的,不知道200CM X 230CM的被套能不能塞下我家的被芯 被子 200*230是什么概念200cm*230cm和150cm*200cm,到底是神马概念 女尔合起来读什么? 女官合起来怎么读 女和句合起来读什么 “女志”合起来怎么读 女和以合起来读什么,以在右面 短文改错.一共十个错误.Walter's goal in life was become a successfully doctor.He knew he had to finish high school first,so he put his heart into his study - in particular,biology,chemistry,and maths.Because he worked hard at these subjects, 短文改错,请写出为什么错 .十个错误.Yesterday,I go shopping in the supermarket.As I was looking at the goods I noticed an old man who was seemed to be following me where I went.As I moved,there he was,smiled at me.I wondered if I had don 言兆 合起来读什么? 英语翻译# REF/CODE DESCRIPTION INGREDIENTS1 213 Toffee Chews (Cod.213)SUGAR(SUCROSE),CORN SYRUP,VEGETABLE FAT(HYDROGENATED VEGETABLE FAT),CONDENSED MILK,SALT,CARAMEL COLOR,SOYBEAN LECITHIN,FLAVOUR,caramel color,cashew fruit,vanillin,powder cocoa2 糖果配料成份翻译431 354 Marshmallow Strawberry (Cod. 354 Soberana)Corn Syrup, Sugar, Dextrose, Gelatin, Modified Starch, Artificial Aroma, Artificial Coloring Red 40, Yellow Tartrazine, Brilliant Blue,Potasio Sorbate32 356 Marshmallow Vanilla 要一篇关于黄河的作文 银色的弹珠糖表面的成分是? 一个口一个四合起来读什么口字旁右边一个四 一个口一个皆合起来读什么 什么叫“动词非谓语形式”?和谓语动词什么区别?非谓语动词=及物动词 缺乏信心导致了他的失败 英文怎么说啊 英语短文改错,一共十个错,Thanks for your letter .It was wonderfully to hear from you .As you're died to hear all about my life here .I'll talk about it now .It takes me a few minute to walk to my high school ,which there's no electricity or y=2^x-a×2^-x的图像关于原点对称,则a= 请用一个词语概括；资讯+广告=?注意是用词语,最好4个字以内.是带有商业性质的 英语短文改错,共十个错. 英语短文改错 快,速度｛共十个错误｝I have the greatest job in the world .I travel to unusual place and work alongside with people from all over the world .sometimes working outdoors ,sometimes in a office ,sometimes using scientific eq 有人用5个词概括了新民主主义革命,请问它们分别指的是什么事件?有人用5个词概括了新民主主义革命,它们分别是"日出东方,星火燎原,力挽狂澜,等他指引,赶京赴考"请问它们分别指的是什么 地质学上岩石残斑是指什么 在日常的网络生活中存在哪些不安全的因素?如何避免? 含氮碱基的结构,N连在哪里?