水生动物特点

I often watch my cat ____ with a ball A.play B.plays C.to play D.playing 选什么.给理由. we often watch him__football on the piayground.A.to play B.plays C.play D.played. Can you____ table tennis?A play B to play C plays D playing Lily and I often （ ）pingpong.A.to play B.play C.plays D.are playingLily and I often （ ）pingpong.A.to play B.play C.plays D.are playing 什么叫做英语的过去分词?列如：go的过去分词是?fly?buy?worry?walk?这几个的过去分词是什么?怎么知道go的过去分词是什么?过去分词有什么特点? 五年级数学在8、10、25这三个数中,成为互质数的是 集合A={x|-2≤x≤a},B={y|y=2x+3,x∈A},c={y|y=x^2,x∈A},且C包含于B,则示数a的取值范围是___________. 人与动物的区别人与动物的组基本的区别 到三角形三边所在直线距离相等的点有几个化石鱼图并证明的结论 9000000000000读作什么?10000000000000读作什么? 在小于200的数中可连数有几个,可连数的进位是什么意思, 过去分词啊? 用一元一次方程解起来十分困难的题目要有解答过程（一元一次方程解法、二元一次方程组解法） 过去分词是什么,怎么用?怎么转换? 过去分词是什么形式,该怎么使用?详细点,容易懂些 甲数比乙数少31,甲数的小数点向左移动两位后是1.23,甲,乙两数各是多少 he doesn't want him to look a fool.为什么把look改为appear let sb.down与frystrating有区别吗?such as:he doesn't want to let him down和he doesn't want to mlet sb.down与frystrating有区别吗?such as:he doesn't want to let him down和he doesn't want to make him frustrating有区别吗? 希望他回家.是want him go home .还是want him to go home. 生活中经常把同样大小的圆捆在一起,每个圆的直径是10厘米,弄七个,问需要多少绳子 已知角AOB=60度,自O点引射线OC,若角AOC：角BOC=1：3求射线OC与角AOB的平分线所形成的角的度数 已知角AOB＝60°若从点O引射线OC使角BOC＝20°则角AOC的度数是? 已知∠AOB=40°,过点O引射线OC,若∠AOC:∠BOC=2:3,求OC与∠AOB平分线OD所成角的度数. 设集合U=｛1,2,3,4｝,M={1,2,3},N={2,3,4},则Cu（MnN）= （A）｛1,2｝（B）｛2,3｝（C）｛2,4｝（D）｛1,4｝ 若全集U={12345},集合M={135},N={345}则Cu（M∩N）=? “Doesn't it make you want to keep taiking o that person”的汉语是什么? dosen\'t it make you want to keep talking to that persen?的汉语是什么 客车,货车各一辆,分别从甲乙两地同时相向而行,在距乙地95千米处相遇,客车，货车各一辆，分别从甲乙两地同时相向而行，在距乙地95千米处相遇,相遇后两车又继续前进，货车到甲地，客车 1.get in ,come in ,enter ,go in .get into ,go into,come into.请说说这几个词组的意思,并说说其中个和哪个可以互换,2.there is nothing wrong with keeping a snoke if you like it.请问此句中的 with 3.A goldfish can weigh up to 4 关于get into一系列词组的问题1.get into the car 2.get into the suit 3.get into the troubleget into的词组后面都要加 定冠词the嘛 come/get into the equation 这两个数的算术平方根是多少657 832