大电流电阻

15的因数有 ,其中有 组互质数. a.b是互质数,它们的最大因数是1对不对? y=x ²=2x-3顶点如何求 画出y=x²+2x-3的图像.【y=x²+2x-3的顶点是? 粗锌和浓硫酸可以构成原电池,那纯锌和浓硫酸能不能呢?还想问下,是这两者就可以构成原电池还是需要其他东西,比如铜什么的 求Y=4（X+3）²-1和Y=2-2x²的顶点坐标Y=4（X+3）²-1Y=2-2x² 锌和铜 浓硫酸 能构成原电池么?书上说是稀硫酸 是不是为了让水把锌变成锌离子 而浓硫酸不行?如果是这样 那铜为什么没有变成铜离子呢? 锌和铝插入KCl溶液会构成原电池么?锌和KCl会反应么?如果不会怎么能做电池呢? 某种东西的成本是为了得到它所放弃的东西.. 这是什么意思? 某种东西的成本是为了得到它所放弃的东西中的它指什么 如何处理同学间矛盾 班会课《如何化解同学之间的矛盾》事例 怎么处理同学之间的矛盾潦草的解答和从网页复制的就不必说了? 如何处理同学之间的矛盾急. 同学之间的矛盾我是女的,在班上,我和一位女同学关系一般般,晚上不会就发个短信,比较经常,刚刚我发了一个短信,她也许是觉得烦了,就发过来说,你什么什么烦不烦.我有点那种感觉,很不自在 关于同学之间的矛盾,急前几天因为她骂了我,我两天没理她,而她却没有诚心的道歉,结果前天我生日,她买了东西送我但什么都没说,我就把她给我的东西还给了她,结果,她就扔了,而且不理我了, 我和同学之间的矛盾整件事情的经过其实也不算复杂.我现在大二.今晚同寝室的一位好朋友突然朝我大发雷霆.原因是班级群里和一个同学发生口角.口角的内容是说他做“化疗”为什么会朝我 与同学之间的矛盾有哪些? K为何值时,多项式X²-X+K有一个因式是X+2? 已知x-1是多项式x²+2kx-(k+1)的因式,试求k的值 酸、碱、盐—重要的盐氯化镁是一种盐,按要求各写出一个有氯化镁生成的化学方程式.a.置换反应____________b.中和反应____________c.氧化物和酸____________d.酸和盐___________e.盐和盐___________ 1.the girl is so smart that she can speak english very well____she's only been learning it for one year A now that B even though C in case D if only 2 there is no doubt ___today greenhouse gases are the largest human influence on global climate A whe 1.“Did you blame him for his mistakes?”“Yes,but I’d rather _____ it.”A.not have done B.have not done2.“Sara left for New York this morning.”“Oh,I thought she _____ until next week.”A.won’t be going B.wasn’t going3.Look at the wa 6.his parents died,__him nothing__a small house.a.left him b.leaving,except c.leaving,only d.to leave,but7.how long will it take to swim__the river?a.over b.across c.through d.in8.the father__his son to stop smoking,but he didn't keep his word.a.made 1.Don't talk about such things ___you are not of.A.that B.what C.as D.which2.Mary had to ask Jack to help her because the box was___to carry .A.much too heavy B.too much heavy C.heavy too much D.too heavy much3.Those shirts are usually 25 each,but to The research is so designed that once _____ nothing can be done to change it.A beginsB having begunC beginingD begun_____ in thought,he almost ran into the car in front of him.A LosingB Having lostC LostD To loseIf you go to Xi'an,you will find the p 某种商品的价格是p元,则80%p可以解释为 有关冲突的事例只要现实生活中的事例,不要作文!今天要! 琼脂培养基为什么不能凝固以上2条都排除了,能不能具体说明下什么是极端条件下,还有会不会是灭菌锅的灭菌长短问题! 琼脂培养基制作斜面为什么无法完全凝固,而做培养皿培养基时可以完全凝固 制备血琼脂培养基~如果琼脂培养基温度高,倒入绵羊血后制成的培养基平板,会发褐色么?还有靠近培养箱风口的地方,有几块平板裂了,不知道是什么原因,培养箱里的循环风对培养基有影响么? 某种商品价格是a元,请解释4/3a元