在数列an中a1等于1

为什么老是记不住单词 为什么有些个别单词总是记不住背单词发现个奇怪的问题,有些单词反复记忆,反复不认识,常见常新,连点印象都留不下,反之有些单词虽说也是头一次见,但是见过一次后,以后就都认识了搞不懂 为什么单词记不住? Let life be beautiful like summer flowers and death like autumn leaves是什么 Let life be beautiful like summer flowers and death like autumn leaves.啥意思? 英语题There___ seven days in a week为什么这个空填are,解释要详细 In Only Seven Days 歌词 在这个句子为什么用as that 不行吗 Tom did not take away the camera because it was just the same cameTom did not take away the camera because it was just the same camera ____ he lost last week.tom 没带照相机 因为他上星期丢了一 How__staying?A:long they will be B:long will they be 选哪个?有什么区别? Kate returned home yesterday.---- Really?Where _____?Kate returned home yesterday.---- Really?Where _____?A.had she been B.had she gone C.has she gone D.has she been 15. —Kate returned home yesterday.—Really ? Where ?A. has she been B. had she gone C. has she gone D. had she been答案选d 为什么 看了很多次 每个提供的答案是D 百思不得其解答案我说错了 答 形容熟睡、疲惫、伤心的词语有哪些? 翻译 Mr Brown doesn't go to work,but he has a lot of clothes to wash. 根据词义组词.花：1.花朵 2.花纹 3.耗费 4.形容像花朵的东西 凄：1.凄冷 2.形容冷落萧条 3.形容悲伤难过 汉译英：当我路过她家的时候,听见她正在唱歌呢.When I walked past ...汉译英：当我路过她家的时候,听见她正在唱歌呢.When I walked past her home,I ____ her _____ in the room. Let's to watch TV tonight.改错. 在下列单词前面加一个字母,变成新单词 any and end other hat here round pen 改错句 Let is watch TV.Nice to see your again.改错句 Let is watch TV.Nice to see your again. Will you get to school tomorrow?yes.____ ____.NO.____ ____(will) Will you go home go to schoolWill you go home_____ go to school?添个借词,并说明为什么? 以前看过本小说. 男主角误死,去阎王殿报道,阎王和马面还在打牌,然后什么情况阎王要他重生.还答应他可以让自己有四种能力. 他选择了杰克逊的舞步, 爱因斯坦的智商 达芬奇的画画水平 还 阎王好什么小鬼难缠 我是阎王他大爷, “清风两袖朝天去,免碍阎罗话短长”什么意思 天灾人祸所造成的严重损害和痛苦是哪个词语的解释? 天灾人祸所造成的严重损失的词语 描写天灾人祸的诗句有哪些?可以突出天灾的残酷无情和人祸的黑暗阴毒 用天灾人祸扩词 Don't talk in the library 同义句_____ ______ talk in the library Don't talk in the library.改为同义句 目前所倡导的智能农业主要指什么? i saw a piece of glass fall down when i walked past the office为什么不用falling down fast food的意思