题目

. -----Has he changed his mind? -----Yes. After some hours of discussion, I ____ to talk him into accepting the new plan. A. had managed     B. would managed        C. have managed              D. managed 答案：D3．设NA为阿伏加德罗常数．下列说法正确的是（　　）A．1 mol FeCl3 水解生成的Fe（OH）3胶粒数为lNAB．4.6g有机物C2H6O的分子结构中含有的C一H键数目一定为0.5NAC．标准状况下，11.2 L CO2 与足量Na2O2反应转移的电子数为0.5NAD．1 mol/L AlCl3溶液中含有3NA个Cl-