海洋覆盖了地球表面的71%,是全球生命支持系统的一个基本组成部分。 A. The ocean covers 71 percent of the earth’ s surf
)”、最后一段“We have a great deal more to learn about our ocean and what lives in it, but progress is being made. We learn more and more each year. But the ocean will never be fully explored. Earth is constantly changing, and it’s important to understand these changes given the ...
It covers (36) percent of the earth. There is still much to be discovered about this (37) blanket of water. Some scientists are studying ways of bringing the ocean’s huge (38) of water to the deserts of the world. Others hope to control the weather by learning more about the (39)...
The ocean covers three quarters of the earth’s surface, produces 90 percent of all its life- supporting oxygen, and is the driving force behind the entire weather system. There are over 450 million cubic miles of sea water on the earth; and each cubic mile contains over 150 million tons ...
But now only 1.2% of these areas are protected. 4 It also requires that research should first be done to see what influence human’s activities might have on the ocean environment. During the past 10 years, the talks were held time and time again. 5 For example, there are ...
The ocean covers more than 70% of Earth’s surface, yet around 80% of the ocean remains unexplored. To put it simply, we know very little about most of the ocean. Seafloor mapping is the first step to uncovering the mysteries of the deep. Sea floor maps increase the scope, efficiency,...
解析 A。解析:先行词是“the ocean”,为物。在定语从句“covers a large part of the earth”中关系词作主语,指代“the ocean”。which可指物作主语,where作地点状语,that在非限制性定语从句中不能使用,what不能引导定语从句,所以选A。反馈 收藏
People call Earth the “water planet”. That’s because the ocean (海洋) covers over 70 percent of Earth.1It helps us in many ways. The ocean is like Earth’s lungs (肺).2Also, the ocean takes in (吸收) 50 times more carbon dioxide (CO2)than our atmosphere (大气层). ...
What covers the ocean floor?Question:What covers the ocean floor?Water:The ocean covers more than seventy percent of the Earth's surface. Of the water on Earth only about one percent is freshwater, with two percent in ice caps and 97 percent in the oceans as saltwater.Answer...
·泰安市高三第二轮复习质量检测) The ocean covers over 70 percent of the surface of Earth today,but over 3 billion years ago the entire planet may have been covered in water.To investigate what our planet was like billions of years ago,a team of researchers turned to indirect methods of ...