1, A mother camel was wal - 已解决

1, A mother camel was walking with her son through the

1, A mother camel was walking with her son through the desert.为什么不能beside 2,It took us over an hour to walk through this street.为什么不能across 3,English is widely used for business between different.between不是两者之间么 4,He drove away at the direction of London.为什么用at,这句话什么意思 5,I agree with most of what you said,but I don not agree with everything.为什么不是something 6,I can not find the pen I was given.Have you seen it?为什么不用that? 7,She asked the man many questions,but he said few words.为什么不用a few? 化学：1,“若取xgA和xgB反应,生成C,D的质量总和不一定是2xg.” 反应前质量不是应该等于反应后质量么 2,Cu+2AgNO=2Ag+Cu（No3）2 哪里错了? 2KNO3+MgCl2=Mg（NO3）2+2KCl 哪里错了? 3CO+Fe2O3=高温（在上面）2Fe+3CO2 哪里错了? CO2+H2O=H2CO3 化合价为什么没变?CO2中C几价?CO3中C几价呢?

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化学：1、 A和B 不一定完全发生反应要考虑过量情况

2、Cu+2AgNO3=Cu(NO3)2+2Ag

2KNO3+MgCl2=Mg（NO3）2+2KCl 不会发生反应复分解反应要有水气体沉淀

CO2+H2O=H2CO3 化合价没有改变 C 都是+4价

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