题目

We’re having a meeting in half an hour.The decision at the meeting will influence the future of our company.  A.to be made  B.being made C.made     D.having been made 答案：A设NA为阿伏伽德罗常数的值，下列叙述正确的是A.1mol乙烷分子所含质子数为30NAB.28gC2H4所含共用电子对数目为6NAC.1L0.1mol·L-1乙酸溶液中H+数为0.1NAD.标准状况下，22.4L乙醇的分子数为NA