题目

It is true that careful planning and foresight fullness is required for doing investments. But it is also true that knowledge of investment just needs a little study and financial research. Some people are scared of doing investment due to lack of knowledge. Some people think they don't require it. But, nowadays many people are utilizing investment solutions UK for having a prosperous future. Investing in UK land is an opportunity for investors to get astronomical returns with very little downside risks. It does not usually require big chunks of money like conventional property market, where 以NA表示阿伏伽德罗常数的值，下列说法中正确的是A.含4molHCl的浓盐酸与足量的MnO2反应，生成的Cl2分子数目为NA；B.标准状况下，80gSO3所含的原子数为4NAC.46gNa与一定量O2完全反应生成Na2O和Na2O2，转移电子数为3NAD.常温下，46gNO2和N2O4的混合体系中含有的氮氧原子数2NA