左思咏史名句

事件A的对立事件为A`,事件B的对立事件为B`,A和B为互斥事件,则A`和B`也一定互斥吗 1.How often____she_____Computer Club meetings?(attend)2.She ____meetings_____a week,on Fridays.111`` People often say time is money .意思 已知双曲线X^2-Y^2 /2=1,过点p(1,1)能否作一条直线L,与双曲线交于A,B两点,且点P为线段AB的中点?我有作出来时y=2x-1.但是为什么会检验出来不存在呢?我不知道是哪一步产生增根了,麻烦解释下, Does Mrs Smith often do housework on Sundays?求翻译.不是不知道,是不确定 does cathy often help her mother do housework?这句话的肯定回答 Mother often _____ housework on the weekend.A.do B.does C.did应该选择哪个? The girl was often heard ( ) happily in her room.A.sing B.to sing C.singing D.sings 书上例句：He was heard to laugh in the next room.有人解释说（参考中而已）不用不定式、这里为被动语态、不是过去进行时、而是现 请问A与B互为互斥事件,怎么证明A的对立与B的对立事件互为互斥事件 中国历史上奋进的年轻人,具有代表性的. 经过点M(2.2)作直线L交双曲线x^2-y^2/4=1于A,B两点 M为AB中点 求L方程 和A没人回答么? 在中国历史上,齐鲁大地名人辈出.你知道多少?试着制作一张《古代山东历史文化名人简表》. 中国历史上最具代表性的文化名人（五位） 好人好事开头最好多点字 优美点 关于好人好事的作文怎么开头 煤化工实习好人好事开头怎么写 A与B为互斥事件为什么P(A)+P(B）=1是错的 什么是互斥事件? 已知双曲线x^2/4-y^2/2=1和点M(1,1)直线L过点M与双曲线交于AB两点,若M恰为AB的中点,试求直线L的方程RT 两个历史文化名人的比较就是济公和阿凡提 这两个人谁的传奇性 神话性与文化深度 思想内涵更高一些呢? I often hear the little girl ___(cry)in the morning.hear后面要不要加doing? 为什么不填crying？？ I found a little girl ______(cry) in the room .是用crying 还是 cry Listen,the little girl______ ______(cry)适当形式 (2)Can you often hear the little girl____ in her room? A,sing B,singing 选哪个 The little baby often什么(cry)at night I spend an hour reading books in the library every day.(改为同义句) （ ） （ ） me an hour ( ) ( )接着上面books in the library every day. x立方减一 的展开式是什么? X立方减4X Daniel thinks speaking with foreigners--- because he can ---understand what they sayA,frustrated;hardly B,frustrating;hardlyC,frustrated;quickly D,frustrating;quickly None of the students (understand)what he (say)did they Any person who can read words and understand what they mean is fortunate.More than half the people in the world cannot read or write.中的fortunate是什么意思呢,是幸运的,还是财富? because they don't understand what you are （ ）（说）请说明详细理由,谢谢.还有这个句子是不是含有宾语从句呀我觉得是said吧他们不理解你说的内容我的怎么就不行了。