以下设备中哪些是属于传播模型测试设备（）
A.CW发射机
B.Scanner接收机
C.全向天线
D.站点勘察设备
参考答案：A, B, C, D
填写单词。
1. It's my _____ (责任) to take good care of my parents when they are old.
2. We all_____ (将……视为) Yao Ming as the greatest basketball player from China.
3. I don't think your son has______(认识到) how important English is to him.
4. Please read the text a ______, so all of us can hear you.
5. This is a new word. Can you tell me how to p_____ it?
在归因理论中，属于内部的、稳定的因素是( )
A．能力
B．努力
C．运气
D．任务难度
