1.Of the two suggestions ( )is tseful to us,but we should adopt them properlyA.both B.either C.neither D.none我想知道为什么不选C,要选B呢?2.——Why are our phone bills always so high?——Well,we make too many phone calls ,so the bills

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1.Of the two suggestions ( )is tseful to us,but we should adopt them properlyA.both B.either C.neither D.none我想知道为什么不选C,要选B呢?2.——Why are our phone bills always so high?——Well,we make too many phone calls ,so the bills
1.Of the two suggestions ( )is tseful to us,but we should adopt them properly
A.both B.either C.neither D.none
我想知道为什么不选C,要选B呢?
2.——Why are our phone bills always so high?
——Well,we make too many phone calls ,so the bills soon ( )
A.add up B come up C.bring up D.pack up
我选的是B,可是add up没有增加的意思啊?为什么选A呢?
3.The problem ( ) at present has something to do with our daily lives.
A.to be discussed B.to discuss C.been discussed D.being discussed
这道题我选的是B,这个就是完全不太明白了~
4.I still remember that morning Kate came to school alone ( )
A.to be upset B.upset C.was upset D.being upset
这个题呢,我选的是D,为什么不选B呢?
5.Our life should be made full use of ( )something meaningful
A.achieving B.achieved C.achieve D.to achieve
我选的是A,也是不太明白的.
这几个是英语的,
CaCO3是不是强电解质?
H2O能不能导电?如果不能的话它为什么算是电解质呢?而且它为什么符合电解质的定义呢?
蒸馏水到底有没有丁达尔效应?
Na2O2为什么算是特殊的氧化物呢?
NH4是不是盐呢?
其实大家也不用全部回答,
还有一个化学的~
氨气溶于水是生成氨水还是一水合氨?
那个打错了,是usefu

1.Of the two suggestions ( )is tseful to us,but we should adopt them properlyA.both B.either C.neither D.none我想知道为什么不选C,要选B呢?2.——Why are our phone bills always so high?——Well,we make too many phone calls ,so the bills
1.第一题是你没弄懂句子的意思.这句话的意思是这两条建议中的任一个建议都对我们有用,但是我们必须合理的采用它.选C是neither,意思是两者中的任一个都不!因此不符合题意.B是指两者中任一都好.
2题的句意是,为什么我们的电话费那么贵呢?因为我们打了很多电话,所以电话费才会增加.
add up 有增加的意思.是固定搭配.而B呢,是开始;发生：走过来等意思.
3题at present 指的是目前,表示的是现在进行的.只有D,Being表的是现在进行的被动语态~
4题,upset在这里是形容词表示心烦意乱的,being+ved.因此不符合语法~
5题是made to do ,固定搭配.full use of 在这里是迷惑楼主的~
化学部分：
CaCO3是强电解质,电解质的强弱不是指它能不能溶于水,而是指它溶于水的部分能不能完全电离.caco3 在熔融状态（也就是在一定温度下使其成为纯液态）下是完全电离的,即所有的caco3都电离成了ca 2+和co3 2-.所以它是强电解质.
H2O能导电.是电解质.电解质分为强电解质和弱电解质,H2O属于弱电解质.电解生成氢离子和氧离子.
蒸馏水有没有丁达尔效应,因为蒸馏水中只含有水分子,氢离子和氧离子,不含有胶体,因此没有丁达尔效应.
Na2O2是过氧化钠,里面的0为负一价,过氧化物都是特殊的氧化物,你想想一般的氧化物里面的氧都是负2价呢?所以它特殊~
氨气溶于水当然是氨水咯`~
NH4那个我不知道你想问什么~所以回答不上来~SORRY咯

英语翻译What effective nonverbal signal would you suggest Lenson send during the interview given the profiles of the two individuals Jenson is to meet. of the two翻译 Two friend visit you.How do you suggest that you all go iuto the living room? 请高人帮我翻译一下这段话.谢谢oil companies often 'reform' compound such as E. explain why this is done and suggest two organic products of the reforming of E. 修改段落(英文)Finally, there are two open question talked about the effects of juvenile delinquency on society. Some people consider juvenile delinquency lead to a chaos society and destroy the harmonious society, therefore they suggest young o since the traffic in Beijing is so ____,i suggest you ____for the airport two hours before the plane _____off. two for the price of the happiness of two people two thousand of the fans 呼啸山庄 Wuthering Heights 的相关问题.1.What does the title of the story suggest?2.Setting of the story:Description of the time and place.3.Who is Ms.Dean?What role does she play in the story? what does the woman suggest the man do Atake lots of photo Bleave early on Sunday What did the words of the man ___? A. idea B. suggest C. means D. meaning Write the nouns of these verbs.Follow the example givencollect ( )educate （）suggest （）introduce （） two of them与 the two of them的区别 1.You can buy either of the two books.2.You can buy both of the two books. Jim is the taller of the two. A be the 比较级 of the two... 两句连词成句1.composition ,check ,mistakes ,your,so as to ,avoid2.monitor ,a ,of ,suggest,the ,discussion ,subject,our 连好麻烦再翻译一下.