2. 外语
  3. An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answe

An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answe

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问题     An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.    The passage tells the readers some knowledge about lichens.
*____________________
*____________________
*____________________
                   Answer Choices
A. Lichens are not unitary organisms
B. Lichens live in a narrow range of habitats.
C. Lichens are not typical of most plants.
D. Lichens are well understood by botanists.
E. Lichens are useful for studies of pollution.
选项
答案BD
解析
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