锐角三角函数sin(-a)

想知道国别史断代史和通史的区别,还有资治通鉴属于什么史,资治通鉴的意义和体会有哪些?还有就是上面的问题回答的了吗、?你看得懂甄嬛传吗?你小学几年级啊,小朋友 请给我发一下《后汉书》《资治通鉴》TXT要白话文的……谢谢了 591213974 secretary [ˈsekrətəri] 发音 secretary 的发音问题..有2种发音我想问下那个是英英哪个是美英 'sekrtri 'sekrtri How long would it take to swim __________the river?A.by B.across C.into D.thoughout 谁能教教我这句话什么意思 how long it would take him to get to the biggesthow long it would take him to get to the biggest还有biggest是什么意思how long it would take him to get to the biggest hospital in town另外请解释it would 英语翻译It is not easy for them to work that problem out的同义句 【气体动理论】从微观上看,气体的温度表示每个气体分子的冷热程度.为什么这句话是错的. look foward to和long for的意思有什么不同吗?好象都是期待渴望的意思.他们是不是都可以接doing啊?最好能有例句.. lucy does her homework as （care）as Lily lucy sings beautiful ,and so does Lily改同义句 求问印在氧化铝上的金属油墨用什么可以洗下来? 气体分子动理论简单问题设容器的体积固定,内有质量为M1和M2的两种不同的单原子理想气体,此混合气体处于平衡状态时两种气体的内能相等,则这两种气体分子的平均速率V1和V2之比 doing I long and now Jack jump are the.(连词成句） do long jump的意思? 澳门风云 童菲在家吊 英文插曲是什么 The noise made the boy go c__根据首字母补全单词 Let‘s go（ ) soccer ball with the boys.That sounds greatA.to playing B.and playing C.and play 干了的蓝色油墨上面在盖印上黄色油墨会起叠色变化吗 求一本比较好的托福词汇的书一本比较好的托福词汇的书, Is there far from here?这个句子对吗?答好有奖 《初中英语同步100》里面都有些什么? 《初中英语同步100》好用吗? 初中英语同步100是最新推出的吗? 《初中英语同步100》跟现在初中英语课本的同步的吗? Can you come on Monday or Tuesday?-I’m afraid _____ day is possiple.A.either B.neither C.some D.any - Can you come on Monday or Tuesday? - I'm afraid neither day is possible.可否译成: 你是周一还是周二能过来? 我怕我两到都不能过去. I'm really anxious,because I can't find my backpack.单据改错 Can you come on Monday or Tuesday?I'm afraid _ dCan you come on Monday or Tuesday?I'm afraid _ day is possible.A,either B,neither C,some D,any — Can you come on Monday or Tuesday —— I'm a— Can you come on Monday or Tuesday —— I'm afraid _____ day is possible.A.either B.some C.neither D.any 初中英语同步100有什么优势? ( )65. —Can you come on Monday or Tuesday?—I'm afraid ___ day is possible.A. either　 B. neither　 C. some　 D. any