A:乙烯的最简式C2H4
B:乙醇的结构简式C2H6O
C:四氯化碳的电子式
D:乙酸的分子式C2H4O2
依法治国的核心是依宪治国,所以宪法是国家的根本大法。( )
Mum wants to make a cake. She needs _______ some eggs.
磁场中某区域的磁感线如图所示,则( )
Are you____ ____the Chinese test?