A．It will rise an average of 1 foot. B．It will be worn down an average of 1 foot. C．It will be worn down to sea level. D．It will lose 730 million tons of solid matter.
A.It B. B．It C. C．It D. D．It
【参考答案】
C 解析：事实细节题 文章的最后谈到了水对陆地的巨大冲击力可以使陆地逐渐下降，因而美国将在 2300万年后完全淹......