oh,it'black____white.What'sthis?

相关推荐

• FeS饱和溶液中c(Fe2+)c(S2与c（H+）*c(OH-)=Kw类似,FeS饱和溶液中c（Fe2+)*c(S2-)=Ksp.常温下Ksp=8.1*10-17.理论上FeS的溶解度为?而事实上其浓度远大于这个数值,其原因可能是?
• Fe2+和S2-反应是生成FeS还是发生双水解?Fe2+和S2-反应是生成FeS沉淀还是发生双水解生成Fe(OH)2和H2S?为什么不发生双水解?FeS溶解度小于Fe(OH)2,H2S会和Fe(OH)2反应生成FeS?
• 下面的这句话标点符号填的对不对?Oh my god!.
• Section A Directions:阅读Mary和Tim之间对话的下一部分,选择will或to be going to将对话补充完整Tim:Did you do all your job?Mary:Almost.Dave spoke to his dad.21 (We’ll / We’re going to) borrow his van.I’ve booked a hotel.22 (We’ll / We’re going to) stop at the hotel on the way to the gig to collect the keys,because we’ll be very late that night.Tim:What about feeding your cats?Mary:Oh no!I completely forgot!23 (I’ll/I’m going to) ask the neighbor.Tim:Don’t worry.24 (I’ll/I’m go
• 写出句子中划线单词的对应词.1.He has a son and a____.Son画线的2.Oh,they are my mother and_____.mother画线的3.This is John and_____is Mary4.He is my friend Jack and_____is my sister Nancy.He画线 5.---Are these your pens?---No,_____are my pens.these划线的
• oh girl i cry cry yo my all say goodbye..oh girl i cry cry yo my all say goodbye..oh my love don't lie lie yo my heart say good bye 我找不到啊.
• —Hey!yurn it off!We don't________music in the reading room.—Oh,I'm sorry,madam.A.like B.hear C.play D.allow说明原因 急用
• 化学元素的符号有什么规律?比如氧是O,是氧气就变成O2了,为什么?再比如：石灰水Ca(OH)2是 氢氧化钠是Na(OH) 为什么一个OH有2 ling 另一个OH没?化合价是什么 具体说明一下
• 为什么有的化学式有括号,有的却没有?如Ma(OH)2NaOH
• 乙醇可以表示为 OH-CH2-CH3
• 4.公园里有一座圆形荷花池,直径是40米,它的列围有一条2米的小路,这条小路的面积是多少平方米?
• He was too busy _ his friend HE was verybusy _his friend