如图所示线段AB是圆O的直径弦CD垂直AB于E一直角CAB=20°

飞机在空中是如何控制速度的?控制范围多大? 七雄争霸车将性格最好是什么 与-457度角的终边相同的角的集合 与角π/3终边相同的集合是? 求两道英语单选 详解-I'm sorry that I failed to save your son .-You are not to blame for ____ you could do for me . A. anything B. something C. all D. none (key:C)这个的主要问题是 anything 和 all 的区别.-Victor certainly cares to 求英语单选详解2Why do not you buy the necklace since you like it so much?I( ),but I don't have the money.A.would B.will C.should D.may用A还是C?着重讲解一下should,shall用于二,三人称时的意义 英语单选求解析!1.It is exactly __we behave __has changed the world.A.which;that B.how;that C.how;what D.what;that 2._____ in an atmosphere of simple living was what her parents wished for.A.The girl was educatedB.The girl educatedC.The girl’ 武动乾坤到目前为止林动有几个老婆 求平方数 那些是平方数平方数?400,82,96,118,196,45,64,58,225,99,175,49那些是平方数? 我国战国时代除了七雄外还有别的效果吧?有哪些? Please give her this ruler同意句 用give please to becky this几个单词连成句子 flying without wings歌词全译~Everybody's looking for a something One thing that makes it all complete You'll find it in the strangest places Places you never knew it could be Some find it in the face of their children Some find it in their lovers 求具体步骤：1、判断级数2^n+4^n/8^n的收敛性.2、计算二重积分ff(x-3y^2)dxdy,D由0 武动乾坤林动到底喜欢谁 计算二重积分∫∫（x-y)dxdy 其中d=｛（x,y)|(x-1)^2+(y-1)^2,y>=x} d=｛（x,y)|(x-1)^2+(y-1)^2=x} D由y=x,y^2=x,y=2围成,求∫∫(x^2+ y^2)dxdy在D上的二重积分 如果一次函数Y=2X+5M-1和Y=-1/3X+M-2的交点在第四象限,求M的取值 一篇以《我最喜欢的一句名言》为题的作文,要400字以上, 武动乾坤 林动 和绫清竹 确认关系是什么时候 多少章亲们告我 A good deal of money has been spent on books.为什么这里是has been,而不用has? Money is spent ___people with illnesses which have been caused by smoking .A look after Blooking aAmy advised him _____the winter vocation with her cousins A not spend B not spending C not to spent Ddon't spend 战国七雄的各个国家有哪些人物耳熟能详的秦、韩、楚、魏、赵、燕、齐的各个人物 （1-2个）记得说是哪个国家的额 难决定 七雄是哪些国家 “战国七雄”指哪几国?马上要 战国七雄是哪些国家 六年级工程问题(讲解) 有没有比较难的六年级工程应用题?还要解释解答过程……急!要100题 有没有比较难的六年级工程应用题?还要解释解答过程……急急急急!要999题在2008年6月15前,急呀!……&*（）...如果超过时间也没关系///,越多越好…………!不只是解答，，还有题目！！！…… 一项工程,甲独做20天完成,乙独做30天完成.现在甲,乙合做,途中甲休息了3天,乙休息了若干天,从开始到完工共用了16天.乙休息了多少天? 这题怎么做（用一元一次不等式来解要过程）