已知抛物线y=1/2x2ax4a与x轴交于A、B，

犹豫不决用英语怎么说? 他变得犹豫不决了 英文? 为什么你总是犹豫不决 用英文怎么说? 几道犹豫不决的英语选择题!1.It's funny____in the pool.A.to swim B.swimming C.smins（这个不可能） D.swam（这个也不可能）在A和B之间犹豫.2.Eating____is not good.A.to much（这个不可能） B.too many C.too much D.to ma 忘恩负义的“负”是什么意思? 忘恩负义负字什么意思 英语翻译“但我仍在等待金钱的到来”的意思,要求尽量简短口语化 翻译Should modern society be criticized for being materialistic? 忘恩负义的意思 he hopes _____ (buy) his parents a big house it is criticized.it is criticized for the labor issue and its ruin to small businesses. By the time I got outside,the school bus ___(leave).Tim was seen ___(get) out of theTim was seen ___(get) out of the subway at the station on Centre Street. Being cool is being popular.第二个为什么用being?能不能不要being? 忘恩负义 的 负 是神马意思? ____(be) cool is being popular. being cool is popular 为什么不是to be 英语翻译请别在别的问题里,复制过来,因为那个是错的.BEING SCARED IS COOL ACTING SCARED IS LAME 给我举些姓氏表单复数的句子~ 翻译:I could not only surf the internet,but also watch DVDs 给试管中的固体加热,实验结束后发现放在桌子上的试管已经破裂,请你分析造成试管破裂的可能原因(写出四种): 谁能帮我解决下这个问题（英语）英语中有这样的单词：cacti--仙人掌 是cactus的复数形式； nebulae--星云 是nebula的复数形式请问象这样的词还有哪些?常规的加S、ES、IES…的那些就不用说了 谁能帮我解决一下这个问题啊~例1 已知b为各位数码全是9的31位数,a为各数码全为9的2015位数,求证b|a.[提示]：要熟知下面的公式xn-yn=(x-y)( xn-1+xn-2y+xn-3y2+…+yn-1) (n∈N)xn-yn=(x+y)( xn-1-xn-2y+xn-3y2-… we saw a lot of studengts playing football on the playground 改为被动语态 1,when you surf the internet,remember not to chat with_____(strange)2,you mustn't always think of____,my kids.(you)第一道题的答案是strangs,第二道题的答案是yourself how beautiful sandy is!(同义句） what does he do in the park是什么意思 how beautiful sandy is汉语意思 天净沙秋的题目是什么 前年用英语怎么说? pretty 怎么读 pretty单词怎么读 What s___ shoes you are wearing Are they new 单词拼写.初三第十三单元.