心理学家沙赫特做了一个著名的________的实验。
参考答案：“情绪归因论”
冠词填空。
1. His father, who is ______ honest man, is teaching in ______ university.
2. Which is heavier, ______ elephant or ______ horse?
3. ______ cold wind was blowing from the north.
4. He is always ready to help ______ old and ______ young.
5. ______ Greens are traveling in ______ South China.
* * 清洁度是根据 * * 分泌物中的成分来判断的，但应除外（）.
A.上皮细胞
B.白细胞（或脓细胞）
C.寄生虫
D.球菌
E.杆菌
