题目内容：
In the lecture, the professor explains coral reefs. Indicate whether each of the following is a true statement about coral reefs. Click in the correct box for each phrase.
参考答案：
答案解析：
不定项选择题：In the lecture, the professor explains coral reefs. Indicate
- 题目分类：托福
- 题目类型：不定项选择题
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