只分布在东半球的海洋是（ ）
A．太平洋
B．大西洋
C．印度洋
D．北冰洋
世界上共有四大洋，其中只分布在东半球的海洋是印度洋．根据题意．
故选：C．
---How did you work out the difficult chemistry problem?
--- I worked it out by ________.
A．working with a group
B．think very hard
C．ask the teacher for help
D．doing oneself
简述电机过热的原因。
