7. Stranglers are so called because they by blocking the sunlight and competing for the nutrients.
8. Since rainforest bacteria and trees depend on each other for life, the relationship they form is termed .
9. Plant species are dispersed over a large area with the help of .
10. As we are still ignorant of millions of unique life forms in the rainforest, deforestation can be compared to the destruction of .
Part ⅣReading Comprehension(Reading in Depth)(25 minutes)
Section A
Directions：In this section，there is a short passage with 5 questions or incomplete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words on Answer Sheet 2.
Questions 47 to 51 are based on the following passage.
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