挑战习题
1/5单选题
难度:

1.下列表达方式正确的是
A 甲烷的电子式:
B 氟化氢的电子式:
C
D
提示1:
6Ziz56a75a2Q55qE5pyA5aSW5bGC55S15a2Q5bey57uP5aSx5Y6777yM
提示2:
5b2i5oiQ5YWx5Lu36ZSu5pe277yM5q+P5Liq5Y6f5a2Q5omA5Ymp5L2Z55qE5Y2V55S15a2Q5LiN6IO955yB55Wl44CC
提示3:
5Yy65YiG56a75a2Q6ZSu5LiO5YWx5Lu36ZSu44CC
正确答案:QQ==
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