单选题
单选题 Where can the tallest trees be found?
  • A. In Muir Woods.
  • B. Near Los Angeles.
  • C. In San Francisco.
  • D. Along the northern California coast.
【正确答案】 D
【答案解析】[听力原文] M: Have you ever visited a redwood forest? I really think I should because of the Muir Woods National Monument north of San Francisco. W: I've never seen a redwood tree. I really can't imagine how big they are. W: The dictionary says they're the tallest living things. Some are more than one hundred and six meters high. But none of the trees in Muir Woods is that tall. You have to go further north in California to see the tallest trees. W: You said that Muir Woods is near San Francisco? I guess it must be quite a tourist attraction. M: Yes, it's less than an hour's drive away. It's easy to get to. W: I've heard that many redwood trees are thousands of years old. Are the ones in Muir Woods that old? M: The oldest documented age for a coastal redwood tree is more than two thousand years. The trees in Muir Woods are 400 to 800 years old. W: Why do they survive so long? M: They have remarkable resistance to forest fires. Their tough, thick bark protects the trees during a fire. The coastal redwoods also like a damp, foggy climate. W: Well then, since Muir Woods is near foggy San Francisco, it must be ideal for the trees' survival. I can't wait to go there and see them.
单选题 Why do many tourists visit Muir Woods rather than other redwood forest?
  • A. It has no admission fee.
  • B. It is near San Francisco.
  • C. It has a good view of the coast.
  • D. It can be seen in one hour.
【正确答案】 B
【答案解析】
单选题 Approximately what is the oldest documented age for a redwood tree?
  • A. 350 years.
  • B. 400 years.
  • C. 800 years.
  • D. 2,000 years.
【正确答案】 D
【答案解析】
单选题 What has contributed most to the redwoods' survival?
  • A. Absence of natural enemies.
  • B. Resistant bark and. damp climate.
  • C. Coastal isolation.
  • D. Cool weather and daily fog.
【正确答案】 B
【答案解析】