类推的思维方法在化学学习中应用广泛，例如：

由此推断过氧化钡的化学式为（　　）

A．Ba₂O

B．BaO₂

C．B₂aO₂

D．BaO₃

He asked me      .

A．who did kick the first goal in the World Cup

B．when was the APEC meeting held

C．when China became a member of the WTO

D．where will the 2008 Olympics be held