电路中电位的计算例题

函数f(x)是以π为周期的奇函数,且f(-π/4)=-1,那么f(9π/4)等于 (A) π/4 (B)-π/4 (C)1 (D)-1 英语高手请进：david promised to come round to have supper with us today.but he ___.I've been alone for half an hourA.won't B.hadn't C.hasn't D.doesn't The moment I got home,I found I _________ my jacket on the playground.A.had left B.left C.have left D.was leaving tom didn’t win ___gold last year,but this year,he got__second change.A.the a B.the the C.a a D.a theDon’t forget____the flowers.They need_____.A.to water,watering.B.watering,to water .C.water,to water D.to water,to waterDon’t be a man like him, 有几道英语选择题不明白.1.You thought I was the boss? Whatever gave you that_____?A.news B.idea C.position D.right疑问：选A.句子什么意思?D不行吗?2.Few pleasures can equal _____ of a cool drink on a hot day.A. Don't call between 12 o'clock and 1 o'clock,____I am usually having lunch.A.at which B.during which time C.by which time D.by which You can never imagine what great trouble I have had ______ the patient who received a serious wound.A.treat B.to treat C.treating D.treatedLittle Tommy was reluctant to tell the headmaster _______ he had done the day before.A.that B.how C.where D.wha 2008全国化学竞赛试题 [高中数学题]若函数f(x)=(ax b)/x (a不等于0),f(2)=1,又方程f(x)=x有唯一解,求f(x)的解析式. It is in London _______the 2012 Olympic Game will be held.A:where B:thatC:which D:whenOur life is no longer _____ it was fifty years ago.A:what B:whichC:that D:thanPlease tell the news to everyone ____is waiting outside.A:whom B:whichC:that D:what 2010全国卷理综一化学第28题题目说ABCDEF六瓶无色溶液 可答案给的A是 NH3 浙江省2010年理综试卷里的两道化学题目9.Li-Al/FeS电池是一种正在开发的车载电池,该电池中正极的电极反应式为：有关该电池的下列说法中,正确的是A.Li-Al在电池中作为负极材料,该材料中Li的 2010辽宁理综化学是不是出错题了,第一道选择题D酯的水解和酯化反应都属于取代反应B苯与溴是取代,甲苯变为苯甲酸既为氧化反应也为取代反应.附：取代反应 分子中某一原子或基团被其他原 大家帮我看几道英语选择题需要正确率谢谢The thief stole the TV,the DVD player,the computer,and the printer while we _______.Nobody heard a thing!1.have been sleeping2.were sleeping3.have slept4.had sleptListen.What a wonderful song!I 函数y=a的x-2次方+5(a>0,且a不等于1)的图像恒过定点 如果a是大于0且不等于1的实数,则函数y=a的x-3次方+3恒过定点类似于这类题目应该怎么做, 设函数y=a的|x+1|次方-1(a>o,a不等于1)则函数恒过___点,它的图像关于直线___对称 2011年全国化学1卷27 我有答案,求解析~~（2011年全国1卷27）.（15分） 下图中,A、B、C、D、E是单质,G、H、I、F是B、C、D、E分别和A形成的二元化合物.已知： ① 反应 HBGC+→+高温 2011年普通高等学校招生全国统一考试的理综化学题,第27题.2011年普通高等学校招生全国统一考试的理综化学题,第27题.网上有这个题,但我找不到答案.科学家利用太阳能分解水生成的氢气在催 第十题d,十一题全部求详解 11题选什么 为什么 化学上海08选择.已知在热的碱性溶液中,NaClO发生如下反应：3NaClO→2NaCl+NaClO3.在相同条件下NaClO2也能发生类似的反应,其最终产物是A．NaCl、NaClO B．NaCl、NaClO3 C．NaClO、NaClO3 D．NaClO3、NaClO4 2008宁夏理综化学11题怎么做啊?谢了 当a＞0且a不等于1时,函数f（x）等于（a的x减2次方）再减3当a＞0且a不等于1时,函数f（x）等于（a的x减2次方）再减3,必过定点（ ）求括号内答案 英语初一选择题答案,正确率高给高分 准确率高1.The village is far away from here indeed.It’s ___ walk.A.a four hour B.a four hour’s C.a four-hours D.a four hours’ 2.The young dancers looked so charming in their beautiful clothes that we took ___ pictures of them.A.many of B.ma 1.在标准状况下,15克CO和CO2的混合气体是10.08L,则这种混合气体中CO和CO2的物质的量的比是..2:12.在标准状况下 某气体的密度是1.96g/L.则它的摩尔质量是________该气体在同温同压下相对气体的密度 三道化学题目!谢谢了.1.铁路钢轨接口可用铝热剂进行焊接,其反应原理是铝和氧化铁被点燃后发生氧化还原反应得到铁,同时放出大量的热使铁熔化而起焊接作用,有关的化学方程式是____________ 双曲余弦函数的反函数怎么求 求双曲正弦,余弦函数的反函数,还有求导过程 英语选择题如何蒙? 明天下午中考就要考英语了,三年没听课,只会简单的单词,一个题都看不懂咋个蒙啊?