六边形怎么画不用圆规

任意六个人中,必有三个人相互认识,三个人相互不认识,请证明（抽屉原理题） 通过六个人就能认识全世界的任意一个人是怎么算的 As we ___ old,we think more and more A.grow B.grow up apart from 和in addition to 可以替换吗 After lunch we had ________.A.a little rest B.a few rests C.rests D.restHow many places of interest have you travelled to since you_____to China,Mr Green?A.come B.came C.have come D.are coming都分别选什么?/大恩不言谢 :) 怎么证明任意三个人中就有两个是同性别的?任意五个人中有三个人识认的或有三个人不认识? when i grow olderwhen i grew older?which? 黄金代换公式,万有引力等于向心力,那个地球表面指的是近地面,没有接触地面吗? 求证世界上任意六个人中,一定有三个人互相认识,或三个人互相不认识 shine b___ over his head 改错A:Excuse me,Li ping,Do you have a color pencil?B：sorry,I do.A:Do you think LinTao have one?B:yes,I think so.youcan ask for him.A:Lin Tao,can I borrow your color pencil,please?C:yes.what color are you want?A:The yellow it.c:here you are.A:than In English,"shanghai" means that "enforcing a man to be a sailor" really? 求证世界上六个人中,有三个人互相认识,否则就有三个人互相不认识! pleasant的反义词 以a开头 厨房下水道没封口,发现有老鼠出没,求方法既防老鼠,又可走水!如图,这是我厨房操作台下面的一个下水道,大概5cm*5cm的洞口,晚上发现有老鼠从里面出来.想要把这个洞口堵住防止老鼠上来!需要 pleasant的反义词 老鼠跑到下水管道里了,怎么办?我家跑进来一只老鼠,跑到了卫生间,然后我找人打它,结果他跑到了我家卫生间洗脸池下面的管道里去了.现在我该怎么办,我拿一个石板把洗脸池下面的那个下水 如何防止老鼠从下水管道钻进来 厨房门是单层玻璃的好,还是双层玻璃的好呢? 有没有像 Over My Head,she is my sin之类的歌曲?或像CS里首歌之类的,名字我忘了,好像是LT LS MY什么什么的 my grandma is well over eighty.这里的well充当什么意思(>_ Over my head能否爆了It's my life?孰强孰弱? The red bags （ ）sale are very cheap.空格中的介词用什么.A.on B.to C.in 在"He bought the watch very cheap"中cheap是副词?可是这句话的答案说，cheap在这里是副词耶！为什么？ 这件打折的红毛衣很便宜.The red sweater___ ____are very cheap. 填空：The red shorts on s____ are very cheap. 《祖国颂》全文!急用! 祖国颂,这时紧的,快 有祖国颂吗? 祖国颂的评价?大家觉得合唱作品祖国颂有什么样的历史意义? 看到花间的蝴蝶,听到鸟的鸣叫 诗句急 青蛙是我们的好朋友,把他们放了.(改为命令的口吻)青蛙是我们的好朋友,把他们放了.(改为商量的口吻)青蛙是我们的好朋友,把他们放了.(改为疑惑的口吻)急,十分钟.快