A．The surface of the ocean is expanding. B．Volcanic activity is increasing. C．The surface of earth contains tons of cosmic dust. D．Thousands of comets are colliding with earth's atmosphere.
A.The B. B．Volcanic C. C．The D. D．Thousands
【参考答案】
D 解析：信息明示题，男士说海水来源的新理论是基于最近人造卫星所拍摄的照片的，宇宙人造卫星最近探测 到，每大有将......