88888,IIF(81=52,88888,1/0)

有一块半径为R的半圆形钢板,计划剪裁成等腰梯形ABCD的形状,它的辖地AB是圆O的直径,且上底CD的端点在圆写出梯形周长y关于腰长x的函数关系式,并求出它的定义域. (be)full of 已知点A（a-1,4）和点B（2,b）关于x轴对称,则（a+b）的2009次的值是? fast,quickly的区别 有的独立主格结构中为什么没分词?分词可以带上自己的逻辑主语,由名词通格和代词主格表示,位于分词结构前,称为独立主格结构.但有几种,如：名词/代词+形容词 Ann came back from the country,her fa 已知点A（a,-2）和B点（3,b),当满足条件______时,点A和点B关于y轴对称. fast soon quickly 有何区别 fast和quickly有什么区别? 英语：关于with引导的独立主格结构,With的复合结构作独立主格表伴随时,既可用分词的独立结构,也可用with的复合结构举例:He stood there,his hand raised.　　= He stood there,with his hand raise.例句的第二 英语中 独立主格结构和with的复合结构有什么质的区别? 英语:with的独立主格结构 with的复合结构 说的不是一回事么? 英语:这个独立主格结构省略with了吗?如果还原的话应该放在哪呢He lay there,his teeth set,his hand clenched,his eyes looking straight up. 《名人传》经典话语 Our soldiers have succeeded ______ some enemy’s important positions.A:to take up B:in taking over C:take up D:to take over 22.our soilders have succeeded in some of the enemy’s important positions.22.our soilders have succeeded in some of the enemy’s important positions.A)taking upB)taking onC)taking overD)taking out many soldiers d____ their lives to our motherland during the Anti-Japanese War many soldiers l_____ their lives to our motherland during the Anti-Japanese War The enemy captured our city in that war 同义句是?急`` I was very tired last night.I was a ( )quI was very tired last night.I was a ( )quickly. “动名词的复合结构”与“分词的独立结构”有什么区别?那我们平时说的“独立主格结构”跟他们两个又有什么关系? 一.把下列各式进行因式分解1.-4a³b²+6a²b-2ab2.6(x-y)²+3(y-x)³3.6(x-3)²-244.x²(a-b)+4(b-a)5.（a+b）²+2（a+b）+16.m²+（a+b）-（a+b）7.（x+y）²-x²8.4（x-y）²-4z（x-y）+z Students spend one yuan buying tichets for music的同义句 连词成句the water,can,Fish,in,swim 中国古代的神话人物最好是夸父追日一类的 I feel very tired,what can I do I feel fine this morning but I______very tired last night. 请分析黛玉第二次葬花的直接原因和根本原因； 从黛玉葬花可看出她怎样的处境和心情 已知直线y=（k/3）*x与双曲线y=k/x相交于A、B两点,过点A作AC垂直于C,且三角形AOC的面积是三分之二倍的根号3,求A、B两点的坐标! 黛玉葬花的故事情景 已知实数A、B满足A(A+1)-(A的平方+2B)=1,求A的平方-4AB+4*B的平方-2A+4B的值 黛玉葬花 体现了林黛玉什么性格 John ____ go bed early last night,so he is very tired today.