题型：判断题 钢铁在大气中发生的电化学腐蚀主要是吸氧腐蚀，在吸氧腐蚀中阴极发生的反应是（）。A．Fe-2e-=Fe2+B．Fe-3e-=Fe3+C．2H+2e-=H2↑D．O2+2H2O+4e-=4OH- 查看答案
题型：判断题 下列各句均有一处错误，请找出并改正。1. It's time for them going to school. 2. I'm one of the tall students in our class. 3. The students of Class Two often walks to school. 4. All the food are on the table now. 5. Flowers start to come out at spring. _________________________ 查看答案