3【题目】阅读填空We live on Earth. Water covers most of the Earth. Nearly all water is salt water. It's notdrinkable.People, animals, and plants need it to live. Where can we find the fresh water? Freshwater is found in rivers, lakes. and streams.Each does not have much fresh water...
Lake Baikal (贝加尔湖), one of the most famous freshwater lake on the earth, lies in Russia, notfar from Mongolia.It is about 636 kilometers long and its average width is 48 kilometers. It covers an area of thirtythousand and fifteen hundred square kilometers.The lake harbors(含有) more...
freshwater ecosystems. Scientists consider this a tipping point when small actions can begin making unusually big differences. A new study has found that 15 to 21 percent of tapped water (自来水) areas have reached this sort of tipping point. Most of those tapped rivers and streams are in dry...
North America’s ancient bald cypress forests have told scientists about history’s legendary droughts and wet periods. Now they’re warning us about the future.
Most of Earth's freshwater sits underground. Worldwide, about 70 percent of the groundwater drawn to the surface goes for farming. But surface waters-rivers and streams come from groundwater, too. Drawing too much groundwater over a short time can be harmful. Natural waterways can begin to ...
in the snow on high mountaintops and in the polar ice caps. So the end result is that we have only about 1% of all the water on Earth that we can use.The freshwater we use comes from surface water and groundwater. Surface water. just as it sounds. is water we can see in ponds....
Most of Earth's freshwater sits underground. Worldwide, about 70 percent of the groundwater drawn to the surface goes for farming. But surface waters-rivers and streams come from groundwater, too. Drawing too much groundwater over a short time can be harmful. Natural waterways can begin to ...
Lake Manasarovar is the highest freshwater lake in the world. This holy lake is located in Western Tibet, about 4590 meters above sea level. Lake Manasarovar is also one of the important pilgrimage centers of Buddhists and Hindus. According to Hindu tradition Manasarovar was created by Lord Br...
Found in fresh water areas of Southeast Asia and Borneo, it’s both the largest freshwater fish in the world and the largest species of stingray. Its threats are many: overfishing, pollution, habitat loss caused by deforestation and damming. The decline of this species in some areas is as ...
Although fossil evidence shows that some early whale species that lacked such kidneys sometimes swam in the Earth's saltwater oceans, these species must have had to return frequently to freshwater rivers to drink.Which of the following is most strongly supported by the information given? A、...