违章作业的主要表现

A∩B=空集 A∪B=A 我不懂这是一个题目的两个条件 既然A交B为空集 为什么 A并B=A B还属于A呢？ 集合{a,b}的所有子集为空集,{a},{b},{a,b}.真子集为空集,{a}{b}.为什麽呢?我不懂. 用所给词的适当形式填空怎么写my bronther have aThat (sound)inerestingyou (have)a tennis racketMy bronther have a baseball batWe have many (club) in our schoolLet's (watch) them on TVshe (play) sports every daycan you (bring) your new pic 草酸银沉淀是啥色 What is like.He have a new flat .There is two beds in her room.每一个句子错在哪 在酸性条件下高锰酸钾与草酸铅的反应 三顾茅庐写的是什么故事 I want to have my o____ room when my family moves to a new flat 有个英语句子的结构不懂,Observes noted down the referees errors,of which there were 61 over the tournament .这句话的结构看不懂额,of which 在这是干啥的,卟明白. 学英语不懂句子的结构怎么办我是一个准备明年考大学的人了.说来惭愧,目前我的英语水平,只能说一些简单的自我介绍,和看得懂一些很简单的单词和词组.最近在高复班,全部都是瞎做.讲评的 all out of love all out of love是什么意思 I am all out of love是何意?其中的短语如何解释? 翻译you can't fight forever ya know?这句话 草莓现在市场价多少/斤? I’ve ever lost my de——day-l_lost-my_love是什么意思? 描写小朋友悲伤的句子 she knew she must keep calmknew 后面的 she 为什么不用her啊,不是说动词后的人称代词用宾格吗 汤姆（Tom）的名词性物主代词 装了low—e玻璃的房间夏天会不会很热 形容词性物主代词名词性物主代词 Thos are Tom`s parents.()clothes are funny 三国演义第三十七回三顾茅庐的感悟,50字左右, She must look for a right place to park her bike.(同义句)She must look for a right place for her bike 对吗 look for the right place for her bike是什么意思 look for the right place for her bike初一U10里有篇文章有这句话,速要啊 She must find the right place______her dog he's looking for the right place to park his bike翻译成中文 beautiful的副词 beautiful的副词是什么 一般副词的位置 例如：beautiful loudly不好意思没分给别误导人 earn him success 和 make him success 区别原句是 it was clear that only hard work could ___ him success . A. make B.earn 答案选B.虽然说前文说到 文中的他天赋不好,需要多多努力.但是我觉得区别未免也太细微了吧?