单选题
[阅读选择]The riches of the sea yet to be developed by man‘s technology are impressive. Oil and gas explorations have existed for nearly thirty years. Valuable amounts of minerals such as iron， copper and so on exist on the ocean floor.
According to the author， technology is important because ______.
A、resources on land are running short in ten years
B、man can use it to explore the deeper sea
C、it is a lot of fun diving into the sea
D、ancient people used it to explore the sea
正确答案：B
答案解析：本段第一句作者提到The riches of the sea yet to be developed by man’s technology are impressive，人类利用技术可以开发的海洋资源是惊人的。段末说到：Valuable amounts of minerals such as iron, copper and so on exist on the ocean floor. 然而，大量有价值的矿物均还埋藏于海底。如铁，铜等等。其他三项都没有提到。