試題詳解

31. What is the main idea of this passage?
(A)Environmental science is a multidisciplinary science so the environmental scientists need to detect, evaluate and fix problems in various fields.
(B)Environmental scientists have to be trained in more than one discipline.
(C) Environmental scientists should focus more on the natural system, such as ecology and geology.
(D)Environmental scientists should assist the managers of a state government to reduce carbon dioxide and other greenhouse gas emissions.