共生
参考答案:
两种生物共同生活在一起,互利互惠、相互依存的现象称为共生(symbiosis)。
They'd like ______, ______, and ______ .[ ]
A. mushrooms, tomatoes, cheese
B. mushroom, tomato, cheese
C. mushrooms, tomato, cheese
D. mushroom, tomatoes, cheeses