难度
参考答案：即测验的难易程度，提供了试题平均通过率的信息。一份试卷的难度取决于每一道题目的难度。难度用全体被试在某题的得分率(P)表示。
辨析填空。
A. compare with/ compare to
1. Don't _____ your strong points _____ other's disadvantages.
2. Man's life is often _____ a candle.
3. _____ his girlfriend, his sister is quite tall.
B. various/varied
5. The influence degree of the anxious state on students' examination result is _____.
6. Practice tenses as much as possible, when you learn a new verb, learn its _____ forms.
7. Why do the _____ characters need so much money?
8. Human's ability is many and _____ -the different knowledge structure will form the different ability.
列举两种生活中常见的混合物，试说出它们分别是由哪些物质组成的．
（1）______；
（2）______．
