题干
——Tina, I want to have a pet. How about a dog?
——I prefer a cat. It is ______ to take care of.
A：easiest
B：the easiest
C：easier
D：easy
答案(点此获取答案解析）
C
——Tina, I want to have a pet. How about a dog?
——I prefer a cat. It is ______ to take care of.
A：easiest
B：the easiest
C：easier
D：easy
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四种原子团（前两者为含苯环的基团）组成属于酚类物质的种类有