―Well, honey, I'm sorry but I have to board on.―____ , and God bless you when you are in Iraq.A. Enjoy yourself B. Do take care C. Have a nice trip D. Mind your steps 答案:B 用NA表示阿伏加德罗常数,下列说法正确的是( )A.78gNa2O2与足量水反应中电子转移了2NAB.1mol羟基中电子数为10NAC.16gCH4中含有4NA个C-H键D.在铜与硫的反应中(生成硫化亚铜),1mol铜失去的电子数为2NA