What does the professor say the scientists might learn about the planets by using the new
A. Their surface features.
B. Their chemical composition.
C. Their temperature.
D. Their age.
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国家和社会教育机构、学生的家长和亲友、教师等，都对新一代寄予这样那样的期望，这些期望都可以理解为广义的()。
A. 教育目的
B. 教育方法
C. 教育理念
D. 教学目标
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？
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