中国大学MOOC: Since codfish are an _______ part of the marine ecosystem, their ______ would adversely affect the animals who depend on them as a source of food.
举一反三
- 中国大学MOOC: Most animals have little connection with _______animals_______ of different kind unless they kill them for food．
- 中国大学MOOC: This part of the sea is rich in marine products.
- 中国大学MOOC: Any and all of these unfavorable impacts may ultimately materially and adversely affect our business and results of operations.
- 中国大学MOOC: The ______ needs of all animals are food, water, air and protection from their enemies.
- In modern society, ( ), as the primary source of energy, would affect the national security.