A:2H2+O2═H2O
B:NH3+HCl═NH4Cl
C:4Fe(OH)2+2H2O+O2═4Fe(OH)3
D:2Na2O2+2H2O═4NaOH+O2↑
把下列句子改成感叹句。
泰山日出的景色真美丽
We usually __________ to school by bike, but she __________ to school on foot.