图2是全球气压带和风带的分布示意图，图中的B带为（）。
A．赤道低压带
B．南半球副热带高压带
C．北半球副极地低压带
D．北半球副热带高压带
参考答案：D
根据句意，补全单词。
1. The boy wants his father to buy a _____ plane for him as a birthday present.
2. We often play games or go fishing in our _____ time after school.
3. We know Obama is the youngest _____ of the American.
4. Good _____ can help you find good job.
5. There are some _____ in the space such as the earth, the sun and so on.
确定合理的阶段斜长要考虑哪些因素？
