A:一个二氧化碳分子:CO2
B:两个氮分子:2N2
C:三个氢原子:H3
D:四个镁离子:4Mg2+
根据你所听到的顺序为下列句子排序。
(____)A.He's my father.
(____)B.I love my family.
(____)C.Who's that woman?
(____)D.She's my mother.
(____)E.Who's that man?
你能给这些式子分一分吗?