工业取得哪些重大成绩

什么是简单随机抽样和分类抽样?举例说明它们之间的最主要区别. I would like to buy things for a Halloween party.这里为什么要填to buy? They wouid you like to buy things for a Halloween 请举例说明操作系统的分类情况 关于脸分类的举例我们选的研学的课题是：脸我将它分成5类,分别是：1五官精致又好看【赫本】2五官不精致但好看（耐看）【俊秀】3五官精致却不好看【?】4五官不精致也不好看【芙蓉JJ】5 和我同学玩用英语怎么说 有性生殖的植物却无性生殖有一些有性生殖的植物 在农业上却是无性生殖的 比如说哪些植物是在农业上发挥作用的 回答越多越好 Did you go( ) last Sunday .--Yes ,I went to the aquarium.A everywhere B anywhere C somewhere ___you ___ (listen) to the concert last night?横线中填什么有会的来!速求答案!急 怎样看天上的星星识别方向? 天上有几颗星星,他们分别叫什么? Would you like( )shopping with me?Sorry,L feel like (　 )the book at home.A to go;readB to go;readingC going;o readD going reading “你不在是我的最爱”用英语怎么说?急.. （我爱,我盼,只可惜你不在）英语怎么说? 我爱的一直是你,哪怕你不在我身边...铭 英语怎么说 自然界中植物最常见的是进行有性生殖吗?如题 Did you enjoy the movie last night?Yes,I didn't expect it-Did you enjoy the movie last night?-Yes,I didn't expect it __wonderful!为什么这里填as ---____ you ______ the film yet?---Yes.l ____ it last Saturday.A.Have；seen；have seen B.will；see；sawC.Did；see；sawD.Hve；seen；saw我已经知道是D了，A为什么不可以？ 下定义和作诠释有什么区别?举例子和分类别呢?KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK 方法有:列数字,举例子,打比方,分类别4 所有植物繁殖的方法都经过开花传粉受精吗 ---Why not go to the Great Wall this Saturday ---I am afraid it is not a good （ ）.Many of us---Why not go to the Great Wall this Saturday ---I am afraid it is not a good （ ）.Many of us have been there.A.place B.day C.plan D.idea并说明理 He would like to stay ____home_____his qarents.A at,with B in,with C at,on Dat.in she would like to stay with me,_________ ________?翻译疑问句 怎么填? 形容香气清淡而持久的成语..急用! 把一段绳子对折3次 ,从中间剪开,有几段? 数学题把一根绳子对折再对折后长3米.这根绳子原来长几米? 形容男性香味的成语 有哪些 we will visit the great wall ___a.a second timeb.the second time go to visit the park,and you will enjoy many great things.用if改写 Will Ann visit the Great Wall? would you like to go shopping with me ? ____I never want to do is going shopping.田anying还是 all