According to the lecturer, why did Europeans often knock on wood？
A. Superstitions generally flow from cultural beliefs.
B. Superstitions are rooted in European culture.
C. Superstitions are irrational.
D. Superstitions are generally a European feature.
Which of the following is the best title for this passage？
A. G-20 Summit
B. The Long Summer
C. The Climatic Tipping Point
D. How Much Human Activity Can Earth Handle？
治疗以下列何者为宜()
A. 祛邪截疟，和解表里
B. 清热解表，和解祛邪
C. 解毒祛瘴，芳化湿浊
D. 益气养血，扶正祛邪
E. 和解表里，温阳达邪
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