h2o2含量的测定

求函数y=x^2-2ax-1在【0,2】上的值域.要求有详细的解题思路! before = in front of He was obviously very nervous and for some minutes stood awkwardly before the microphone.before 应该用在时间,in front of 才用位置为什么这里不用 in front of 而用了 before? 怎么通过体积算质量 The book is ___than that one.A.useful B.the most useful C.much more useful D.a little usefulThe book is ___than that one.A.useful B.the most useful C.much more useful D.a little useful 求函数y=x2-2ax-1,在[0,2]上的值域. i have left my book in your room中的left怎么理解?这句话译成我把书忘记在你的房间里了,这里为什么要用left?不是离开的意思吗?为什么不用fotget? He might as well have picked a family___out of the telephone book and stayed with them.A at random B at a time C after all D in detail选哪个?为什么? the room is in the terrible mess ,it can not have been cleaned .为什么用can not have been为什么不用should not have been 英语翻译 1.The chair are in the room 2. How mang book do you have改错 mortgage 和 down payment 总是搞不清, 贸易里面的down payment at shipping什么意思? 高考英语My mom suggests that we ________ eat out for a change this weekend.A.might B.could C.should D.would 英语翻译This passage suggests that given the right conditions,ambition can easily overcome morality and push people to acting the way they never thought they would.Doubting their own virtuals. 〖RT〗求解三道数学题 一道数学题.RT RT甲乙两车分别从A B两地同时出发,相向而行.甲车每小时行60KM,乙车每小时行72千米.当乙车比甲车多行了18千米时,甲车行了全程的30%,求A B两地距离 求翻译题的答案,74.His magic shows must have been well received as long as his audience did Be well received 英语翻译Much of this is a preamble addressing public comments,but that will nonetheless serve as guidance for the rule’s implementation before 和in front of 的用法新概念二册 第一课中的一个课后练习The young man and young woman were sitting behind him.He was sitting(空) them.这里选的是 infront of 我是认同的 但是为什么不能用before 呢 we accept D/P payment only once 30% in advance against advance payment guarantee怎么翻译啊 英语翻译As inducement for you to approve and ship the captioned entity's order for [specify] and ancillary equipment,________________________,hereinafter called the guarantor agrees to guarantee payment of the [number] installmentsof the [number] 0005 - Advance Payment中文如何翻译 RT, 英语翻译一定要准确 advance payment是什么意思及反义词 Nothing comes from nothing.还有其他答案没？ nothing comes from nothing.可以翻译成没事找事吗? Nothing useful ever comes from comparison to others.翻译一下,谢谢 我的汽车里出现SECURITY这个是什么意思