碳酸钠和碳酸反应原理

．As a journalist you should first decide what event before you make some interviews.．As a journalist you should first decide what event _____ before you make some interviews.A.reported B.to be reported C.to report D.reporting 那此题应选哪项As a journalist you should first decide what event___before you make some interviews.为什么to be reported 不行 《成均馆绯闻》中“老论”“少论”是什麽意思 翻译成中文In this bliss,we cannot feel fear or dread. 英语翻译我真是个神经病 英语怎么说我真是脑子坏掉了 英语怎么说 高二棱锥中的二面角问题正三棱椎相邻侧面所成二面角为α,侧面和底面所成二面角为β,通过计算我发现2cosα+3(cosβ)^2=1同样有一道题是把问题中的正三棱椎换成了正四棱椎,结果是2cosα+2(cosβ)^2 A为m*n矩阵,B为n*p阶矩阵,AB=0,故r(A)+r(B)≤n.AX=0 解向量的秩=n-r(A),然后就直接说所以,r(B)≤n-r(A),怎么变成了≤? I am so love you that I am such painful正确吗?：中文应该是 我爱你那么多 所以那么痛用不用SO THAT 无所谓‘‘‘ SOS!高二数学题（三棱锥A-BCD···二面角C-AD-B的平面角）三棱锥A-BCD中,AB垂直于BC,AB垂直于BD,BC垂直于CD,且AB=BC=1.（1）求证：平面CBD垂直平面ABD（2）是否存在这样的三棱锥,使二面角C-AD-B的平面 一个幼儿班有40名小朋友,现有各种玩具122件,把这些玩具分给小朋友,能否保证有人会得到4件或4件以上的玩具? 某幼儿班有40名小朋友,现在有各种玩具122件,把这些玩具全部分给小朋友,是否会有小朋友得到4件或4件以上的玩具? 请问“That'll be fine.”怎么翻译? 有一只狗会跟别的动物说话的是什么电影? 词形填空Debbie's __________(gone) to work.she'll be back about five o'clock.请您说明原因 I don't believe they'll arrive before five o'clock__ __?A do you B do I C do they D will they we'll be there _______________(tonight /five o'clock/ten minutes) 倍有“bè”这个读音吗? 拨有没有bá的读音? under u的音标 under的u的音标是什么? 快 急用 decline 和 shrink 的区别?If you cycle everywhere,you could ____ your carbon footprint by 0.3 tons a year.A.decline B.shrink 为什么? high的最高级是什么 英语翻译External suppliers in the meaning of this directive are suppliers who are different legal entities than XXXXX,where XXXXX has no direct or indirect majority holdings.Internal suppliers in the meaning of this directive are business units p 信用证中supplier must negotiate with 2 original and theri respective copies i`d like to help you ____your child when you are busy or away 1.look for 3.laugh at 3.care for4.depend on Here are your test papers,children.Who'd like to help me___?选D A.pick them up B.give them out C.look them up D.let them out 具体说说什麼是bargaining power of consumer and supplier? 温故而知新,可以为师也.该如何应答 148的最简分数是什么 温故而知新,可以为师挨 We can't __________ him,so we _______ him 求填空越雷人越好 who did he told about