设nA为阿伏伽德罗常数的数值,下列说法正确的是 设nA为阿伏伽德罗常数的数值,下列说法正确的是 A.23g Na 与足量H2O反应完全后可生成nA个H2分子 B.1 molCu和足量热浓硫酸反应可生成nA个S 分类:英语 题型:单选题 查看答案
What is the probable relationship between the speakers? What is the probable relationship between the speakers?A.Salesperson and custome 分类:英语 题型:单选题 查看答案
What is the woman's opinion about the course? What is the woman's opinion about the course?A.Too hard. B.Worth taking. C.Very 分类:英语 题型:单选题 查看答案