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你看我这样说对么,火星的轨道平面夹角就是火星公转轨道与地球公转轨道的夹角,而火星轨道倾角就是火星赤道与地球公转轨道的夹角还有请问下轨道偏心率是什么啊? 释的组词 释怎么组词 一元函数微积分的重点是什么 At the foot of the hill,however,__ was a small house with a tree in front of it.A thereB whereC whichD it为什么选A?如果要选C 该怎么改? One afternoon David plays soccer in front of a house with his friends.……One afternoon David plays soccer in front of a house with his friends.A young woman comes up and asks him,“David,is your father at home?”“Yes,he is.” Answers the boy. 狗的生物分类狗在分类上属什么“-界-门-纲-目-科-属-种” 狗属于什么种,属,科,目,纲,门,界如题,知道多少说多少,请阁下以认真负责的态度作答 怎样判断生物与生物之间是属于种还是属还是科还是目还是纲还是门还是界?例如马和狗 不要表 要方法生物分类是研究生物的一种基本方法.生物分类主要是根据生物的相似程度（包括形态结 英语脑筋急转弯!1.I am adragon,but I cat't fly.I am a snake,but I can't bite.I am a wrom,but I cat cross the river and the mountain,day and night.What am 2.What walks with its head on the ground?3.What has a neck but can't swallow?4.What goes s 英语脑筋急转弯,you are standing at a well with two pots.One holds seven litres and the other holds five litres.Neither pot has any markings so the only amount of water you can measure accurately is when a pot is full.How can you measure out ex 英语脑筋急转弯,You haven't sharpened your pencil ,but you feel it is shorter ,why?What can you find in the middle of a box?A man went into a lion cage ,but he didn't get hurt ,why?A pair of shoes costs thirty dollars .How mach is one shoe?Why 德国牧羊犬,藏獒在分类上它们都属于什么门,什么纲,什么目 Is your father a_______(police officer)?Yes,he is. f(x)=x|x| 1) 用定义求导 2) 用定义求出f'(0)的值 3) f(x)和f'(x)两个函数是否在x=0处连续? 英语翻译我知道并且感觉到你的在那一瞬间迸发的幽默另外,以that引导的定语从句,从句部分是否可以用主系表结构?如果可以,请举例说明一下, 生物学分类依据是什么?有多少门,纲,木. they are a() 600 students in the school. ( ) your math teacher of medium build? yes he ( ) 填is还是does 英语中 we you they 怎么排序 ———— are middle school students我要百分百正确,网上答案太多了啊 我国常发生的极端天气有哪些?如题 我国夏季常发生的极端天气有哪些? 为什么最近我国极端天气常出现?是不是《THE DAY AFTER TOMORROW》的情节真要在现实世界中出现了?我还不想死!柯南 2007年发生的极端气候事件有哪些?2008以来发生极端气候事件有哪些? 谁能给我几个英语脑筋急转弯?我要稍长一点,五六句话（或者多一点）,初一的人能听懂的! 几个英语脑筋急转弯1：what is black when it isclean and white when it is dirty?2：what never asks questions but always gets answers?3：where does afternoon always come before morning?4：Three men are under one umbrella ,but none of them g 几个英语脑筋急转弯 why is your English teacher like a judge?what can you drop without losing anything?why are movie stars cool?what kind of cars do muvie stars want to drive?why is life the hardest riddles? 青蛙王子英语读后感 英语翻译女孩不要让我恨你! 英语翻译你永远不会知道我有多么喜欢你! 英语口试题目24.Today,a large number of people,especially young people,like to make friends online.Make your comments on this phenomenon.5.The Chinese soccer team is of common concern,since it has been the weak in our heart for over a decade.Do 北京动物园的参观路线,我们明天要带宝宝去动物园,中午才能到动物园,求一份最省时间的参观动物路线,包括海洋馆.最好再有一份园内的地图.例如：进门后向右走,到猴山——狮虎山——大象