关岛距离中国多远

18题：△ABC中,D在边BC上,且BD＝2,DC＝1,角B＝60度,角ADC＝150度,求AC的长及△ABC的面积. 16题：三个数成等比数列,其积为512,如果第一个数与第三个数各减2,则成等差数列.求这三个数. 不等式(3-π)x小于等于π-3的解集是_______,其中最小的整数解是_________ 化简:sin(a+180)cos(-a)sin(-a-180)说明:题中180为180度角. 1.不等式5(2x-1)大于或等于x-21的负整数解是2.x/2-2x-1/3de zhi budayu 1的负整数解是3.某校两名教师带若干学生去旅游,联系两家标价相同的旅游公司,他们的标价的为每人50元,经洽谈后,甲公司给的优 集合A={X│Kπ+π/4≤X＜Kπ+π/2,K∈Z}集合B={X│X≤2}求：A∩B 怎么提高英语阅读理解和完形填空的能力我的听力和语法还可以,主要是完型和阅读拉分,导致英语成绩不好,怎么才能提高阅读和完型的能力 若不等式组 x^2-x-2>0,2x^2+(5+2k)x+5k 若不等式组x^2-x-2>0,2x^2+(5+2k)x+5k 若不等式组X的平方－X－2＞0,2X的平方＋（2K＋5）X＋5K＜0的整数解只有－2,则K的取值范围是? 用配方法解方程 x²+6x+7=0 6x=7.5.解方程 英语选择 这个咋做,英语选择 The growth of part time and fiexble working patterns ,and of training and retraining schemes,____more women to take advantage of employment opportunities.A.allow B .have allowed C .allowing D.allows 这个英语选择如何做呀The narrow passage _ the big mountain for one mile.A.passes through B.lesds to C.leads on to D.reach 英语选择帮你一下 两道英语选择（）______trouble,I'm going to forget the whole affair.A.Then rather cause B.Rather causing C.Rather than cause D.Rahter than caused( )The brilliance of his satires was___make even his victims laugh.A.so as to B.such as to C.so th 英语选择两道 英语 英语选择. 两道应英语选择1.Don't worry.We will e-mail you as soon as we_______in Hong Kong.A.arrive B.arrives C.will arrive D.would2.Don't worry.l will be with you________your mother comes back from work.A.when B.until C.as soon as D.unless (x-2)(x-3)+2(x+6)(x-6)-3(x-4)^2其中x=2 3:4=6:(x-2) X是多少 x-1/3-x/6=4-x/2 （英语）选择 6：x=0.4：3/2 英语选择, 1.We need plenty of fresh fruit every day.改否定句2.I should drink a lot of water every day.改否定句3.Sue's diet is as healthy as her sister's diet.用陈述句表达相反意义4.Your diet is unhealthy than mine.保持句意不变 英语连词成句①Tom matter the what's with②matter is what the them with③the it into gote flies按要求写句子①My mother is going to (buy me a T-shirt)对括号里提问 一.根据中文写英文.1.十条金鱼________ 2.三箱牛奶________ 3.八只鹿________ 用以下单词及短语编一个故事,不少于50个单词.Sunday twins as...as taller than happy parkThe twins are in th parkLt is Sunday today.( )