在图中，A、B两球间一定有弹力作用的是[ ]
A．
B．
C．
D．
答案：B
根据提示填空完成对话。
Li Ming: Mike, can you go shopping with me? I want a ____________ (新的) shirt.
Mike: OK. Let's go.
Mike: Do you like ____________ ____________ (这一件)?
Li Ming: No, it's ____________ ____________ (太大).
Mike: Look at ____________ (那件) yellow shirt. Do you like it?
Li Ming: Yes, I like it.
经济发展与经济增长是什么关系？
