生态系统平衡的标志是（）。
A、能量输入输出稳定
B、生物量高
C、结构稳定
D、功能作用稳定
E、适于人类居住
参考答案：A, C, D
根据句子或对话意思填空 .
1. —What _______ do you like best?
—Yellow.
2. Can you _______ your own conversations?
3. The white jacket _______ l0 dollars.
4. —How _______ are these socks?
—They are two dollars.
5. —How much are these pants?
—_______ are 6 dollars.
6. —Can I _______ you?
—Yes, please. I want a hat.
7. —Thank you for playing basketball with me.
—You're _______ .
“耳听为虚，眼见为实”说明了社会知觉和归因层次中的（）。
A.刻板印象
B.先入印象
C.成见效应
D.晕轮效应
