一年级语文上册培优作业

现在完成时练习题选用have,has填空I______told him the news.she_______come back from school.You _______won the game按要求改写下列各句they have bought a computer.改成否定句He has lost his book.现改成一般疑问句,再做肯 现在完成时练习题 一、单项选择 1.Li Hong has ________ the army for 2 years.A.joined B.be in C.been in D.joined in 2.We have been friends since ______.A.children B.five years C.five years ago D.five years before 3.Mike ___________ the sto 0.25x(4+0.4)+9怎么简算? 已知函数f（x）=（x^2+c）/（ax+b）为奇函数,f(1) 已知函数f(x)=(ax-1)/(x+b),如果不等式f(x)>0的解集是(1,3)已知函数f(x)=(ax-1)/(x+b),如果不等式f(x)>0的解集是1老师抄的题。我也不是很清楚。 现在完成时练习题1.用have（has）been或 gone填空.A：Where _____Li Fei______?B:He_______to Hainan Island.A:How long ______he ______there?B:He ______there for three days?A:When will he come back,do you know?B:I'm afraid he won't come back 现在完成时 练习题 求高手完成下面关于现在完成时的练习1 I have_____met him before, so I have no idea about him.2 Jack has______ finished his homework.3 Mr. Wang has_____tanght in this school for many years 4 "Have you______seen the film?" x^2+（a-6)+9-3a=0和x^2-(a^2+a)x+a^3=0怎么解? a是什么实数时,方程1-3a-x/3=0的解在0与6之间(不含0和6) love song 中文歌词就是那种像：“嘿努你K不呆弄奈 嘿努你米搜呆弄奈 嘿努你沟你巧楼没流哇 不里叶撒拉球不K”这种的,可以根据这唱出来的. love songs on the radio 中文歌词she looks just like an angel when she walks across the room she shines tonight her golden light is everything i need lovers all around her she wears them like her jewels my friend said she's all he needs to feel al Love Songs on the Radio中文歌词[00:35.93]It's christmas again so we lit all the candles[00:46.72]And we tried to pretend that your room was a palace[00:58.48]But we can't seem to shake off the fear[01:03.76]That nothing is different, that no-one 求 the I love you song 的全部歌词. set fire to the love song 歌词 1.是否存在这样的整数a使方程组 3x+4y=a① 4x+3y=5② 的解是非负数?如果存在,求他1.是否存在这样的整数a使方程组3x+4y=a①4x+3y=5②的解是非负数?如果存在,求他的解,如不存在,说理由.为了迎接世 是否存在这样的整数a,使方程组3x+4y=a,4x+3y=5的解是一对非负数?若存在,求出它的解,若不存在,请说明理由 a是方程x2-2008x+1=0的一个根 ,则a2-2008a+2008a/a2+1的值 已知a,b是一元二次方程x2-2008x+2009=0两个实数根,则(a2-2009a+2010)(b2-2009b+2010)的值是多少? 求红楼梦人物关系图谱最好是树枝型的. 红楼梦人物关系图 清清楚楚的今天会答、好处多、 简单的红楼梦人物关系图 是否存在这样的整数a,使方程组3x+4y=a,4x+3y=5的解是一对非负数?如果存在,求出它的解, 是否存在这样的整数a,使方程组 3x+4y=a 4x+3y=5 的解释一对非负数?并求出它的解 需要 (1)是否存在这样的整数a,使方程组[3x+4y=a,4x+3y=5]的解是一对非负数?如果存在,求出它的解;若不存在,请...(1)是否存在这样的整数a,使方程组[3x+4y=a,4x+3y=5]的解是一对非负数?如果存在,求出它的解; 1. 四分之一-九分之一x²2. x四次方-25x²y² 先化简再求值 二分之一（2x²-6x-4）-4（-1+x+0.25x²）其中x=59点之前要哦 不定几分的一道题,希望有解答, 今天英语卷子上有一道题,It ( ) hot in summer.A.was B.were C.is选哪个? 对不起啊,又麻烦你了,又有一道题,希望你能帮我解决已知4a∧2+b∧2+4a=2b-2,求＜(3a-b)(3a+b)-a(a-4b)+b∧2)＞÷(-4a) 绝对值P小于2,不等式px+1 一道关于所得税的题,希望会的给点解答方法!今天晚上需要,Peter is a married man and was born on 26 September 1968.He gave up his job as a glazier on 6 May 2003 and started up his won business two days later.During 2003/4 income f