A：Cl－的结构示意图
B：铁红的化学式为Fe3O4
C：甲醛的结构简式：CH2O
D：CO2的电子式
Will you for your do What brother (连词成句)
____
选词填空：I ____ (rides/ ride )my bike to school.
1.23×9＋0.04＝11.11
12.34×9＋0.05＝111.11
123.45×9＋0.06＝1111.11
____×9＋____＝____
