The author mentioned the deeper atmospheric and oceanic research in the last paragraph with the intention______. A．to explain that the research should be exhaustive and sufficient B．that the administration should take conservation measures C．that the Congress should take the legislative initiative D．that actions should be taken rather than research only
A. A．to B.that C.that D.that
【参考答案】
D 综观全文，作者的中心意思就是要采取行动，科学研究可以作为向导，而不要只停留在研究上面，作者举了三个例子都是为......