如图7-58,AD是三角形ABC外接圆的直径,角ABC=角CAD,圆O的半径OA为5am,求AC的长

各种试剂的保存方法及其（离子）方程式,保存理由不要一概而论的那种例如Na,保存在煤油中.原因：活泼金属,易与空气中成分反应.密度比水小,能和水反应.密度比煤油大,不与煤油反应…… 英语语法 wood 是否可数 高中英语disagree的用法 accustom 用法 (B) the new comers had to____independently to make permanent hmes in the new country.A.accustomed to living B.accustom themselves to living C.be accustomed to live D.accustom to living 如果填 be accustomed to living 的话是不是 你自己是很害羞的女孩 翻译成英文 我觉得你是个有个性的女孩 英语翻译 英语翻译求翻译.i wouldn't mind having my hands all over his neck and shoulders 只用一种物质鉴别下列物质,写出所用试剂名称（中学）1、BaCl2、NaCl、K2CO32、NaNO3、MgCl2、(Nh4)2SO43、CaCl2、NaNo3、H2SO44、NaCl、H2SO4、Ca(OH)2 his radio is still on 为什么中间会加is He wouldn't mind doing extta work for the _______(student) Union. 翻译一下 下列每组物质只用一种试剂鉴别,写出所用试剂名称1.盐酸和硫酸溶液2.烧碱溶液和熟石灰溶液3.硫酸溶液和硝酸溶液4.烧碱溶液和纯碱溶液5.硝酸溶液和盐酸6.纯碱溶液和食盐溶液7.碳酸钙溶液 act 和action的区别大家帮忙分析下面两名话该用哪个词比较好?A.He saved a drowing boy yesterday,so he was awarded by the local governmnet for his brave_______.b.___________ speaks louder than words.请各位高人评点并说出两 GROVE怎么样 FOREST怎么样 forest,可数吗 act 和action有什么区别 本人姓邱,想给儿子取个名字.按辈分排中间这个字是个国.中间这个字一定是国.名字被采纳以后一定再给加分.. 用excited造句要注意什么啊?能说Are you excited? 请问一下小孩的名字中有一个'泽',这个字是放在中间好还是最后好全名叫孔睿泽 Would you like等于（ ）（ ） Just_____the time to stop and thinkJust ______ the time to stop and think about everything good that has happened to you.just后边那个空填什么?.A.cost B.take C.spend D.pay 孤寂的近义词有哪两个呢? I do not know what to do for light in the evening 翻译句子the tiring instruction was still waiting for me struts2的action类继承action 和supportaction有什么区别 an illegal activity or action英英互译 孤寂的近义词 scientists said they spent four years making it 同义句 英语翻译APO/DPO/FPO 重点翻译 but how many of us can honestly say that we have not felt a little envious of their simple way of life and their freedom from care?请问一下这句话中,from care怎么解释? 高中化学实验中常见套话求高中化学实验题中常见套话.套话和三楼的那样的，不过我想知道更多的。 Past past,memory