数学课时作业本答案

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已知cosa=3/5,且a为锐角,则sin(a+TT/4)A.3根号3+4/10。B.4根号3+3/10。C.2根号3+3/10。D.2根号3+4/10 已知0 Edison was ____ great inventor.He invented___ electric light.填什么冠词 edison is the inventor of the light bulb1,为什么is不是was 2,为什么light bulb不是可数名词 Edison is a well-known American inventor. 完形填空悬赏高分,急!Edison is a well-known American inventor. He was taught by his mother when he was a child. Later he learned things (1) _ himself by reading and experimenting. He built a lab fo 利用化学方程式计算的依据是1 化学方程式表示了一种化学反应过程2 化学方程式能表示出反应物 生成物和反应条件3 化学方程式能表示了反应前后反应物和生成物的质量关系4 化学方程式中, take to book your the please math sister连词成句 根据句意和首字母填空.(1)is your math book on the desk?No,it's i___the drawer.(2) where's my chair?it's n__to the table.(3)a_the picture on the wall,it's my family photo.(4)the old man wears a black h__.(5)the boys like c__games.(6)my pecil Thomas Edison was one of the great (s ) in the world. notebook my bookcase is the in连词成句some need i helpthe are pictures the under tableplease tideo tapes those cme bring to my,in,the,reading is,book ,study,a,sister(.)连词成句 This is my book.______is in the schoolbag.用适当的人称代词或物主代词填空。______ is Tim Smith.______ first name is Tim. book,is,you,of,the,front,in(.)连词成句 连词成句 My pencils the schoolbag under is desk the in schoolbag are schoolbag and the 三个连续偶数,中间这个数是m,则相邻连个数分别是()和(). m是偶数,与它相邻的两个偶数是()和() ( 2x/0.7)-(1.2-x/0.3)=1 问:x是多少? 写第一次真好的作文写第一次干什么的 x-3+7-2+8+1=2x-1 the ruler is blue.的中文 The pen and the ruler is blue.这句话错在哪里? 对打括号的部分提问1、The ruler is (blue).____ ____is the ruler? 迷茫中Milk chocolate contains 44 mg of theobromine per oz.Semisweet chocolate contains 150mg/oz.Baker's chocolate 390mg/oz.Using a dose of 100 mg/kg as the toxic dose it comes out roughly as:1 ounce per 1 pound of body weight for Milk chocolate1 o 最近对数学题都有点迷茫,以下/都代表分数线1.2/X-3=1-X/3-X的增根为_____2.已知:k+r/m=s,则m=_____3.方程2(x+m)/m(x-1)=- 8/5,x=-1/5,则m=_____4.x/x+2-3/x²-45. 困惑的数学题1.一张方桌由一张桌面和四根桌腿组成,已知1立方米木料可以做桌面50个或桌腿300个,现有5立方米的木料,全部用来制做方桌,则用于做桌面的木料为多少立方米? 已知11个元素的有序表为(5,13,19,21,37,56,64,75,80,88,92),请写出折半查找的算法程序,查找 已知数组{1,11,21,33,45,13,56,22,8,19,20,2} 那么如果要是输出数组中能被3整除的数的和得出能被3整除的数又能得出和 数组A中,每个数据元素的长度为3个字节,行下标从1到8,列下标从3到10,存放该数组至少需要的单元数是270?希望能详细说明一下具体的解答过程,谢谢! 某商店购进一批单价为8元的商品,如果按每件10元出售,那么每天可销售100件,经调查发现,这种商品的销售单价每提高1元,其销售量相应减少10件,将销售价定位多少,才能使每天所获销售利润最大 谁给说下这道数学题怎么写已知反比例函数y=x分之k+1,且(x1,y1)(x2,y2)是其图像上的两点,当x1<0<x2时,y1>y2,则k的取值范围是多少? 谁给说下这几道数学题1.已知等腰梯形的一个底角等于60°,两底分别为13厘米和37厘米,则他的周长是多少?2.已知:A(-2,y1),B(1,y2),C(3,y3)都在反比例函数y=x分之一的图像上,则y1,y2,y3的大小 问一道数学题,说下思路过点P(3,4)任做两条互相垂直的直线l1、l2分别交x轴、y轴分别交于点A、B,试求线段AB中点M的轨迹方程、