A. there are more enemies B. the water is polluted C. they want to play D. they are hungry 相关知识点: 试题来源: 解析 B。此题考查海洋动物改变狩猎方式的原因。水被污染会影响它们原有的狩猎方式,A 选项敌人增多不是常见的导致改变狩猎方式的原因;C 选项它们想玩不符合实际;D 选项饥饿不是改变狩...
5. another vital factor in keeping cut flowers is the quality of the water in which they are placed. flowers find it difficult to drink water that is dirty or otherwise polluted. even when water looks and smells clean, it almost certainly contains harmful substances that can endanger the flow...
(1)Man can only drink and use 3% of water on the earth. It comes from rivers and lakes. And some of the water is polluted, (2)因此我们不能全部利用它. Now more water is needed. The problem is: can we avoid (避免) a serious water shortage later on?(3)首先...
That means keeping the land, water, and air clean. ( )1.A. easyB. easierC. the easiest ( )2.A. aB. anC. the ( )3.A. andB. butC. so ( )4.A. withB. ofC. to ( )5.A. polluteB. pollutesC. polluted ( )6.A. angryB. angersC. angrily...
Just think of the___fish that die by the thousands because of polluted waters.Biologists have___that all kinds of wild life are___in the areas where they live. Even the wolf, which we___dangerous and “bad”, plays an important role in nature. Here is an interesting example....
There are still many problems of environmental protection in recent years. One of the most serious problems is the serious pollution of air, water and soil. the polluted air does great harm to people’s health. The polluted water causes diseases and death. What is more, vegetation...
Even 5., some of the water has been polluted.Of course, the little water is still enough for us if no more water is wanted and some of it can be recycled. But today more and more water is needed by more and more people, more and more factories. We must take steps to6.these ...
【3】在you后加been 【4】polluting→polluted 【5】在heard后加of 【6】在attention后加to 【7】在have后加been 【8】在have后加been 【9】去掉which后的has 【10】teaching→taught 【解析】 【1】主语ways是复数形式,故要把has改为have。 【2】小说是被卖光,所以要在have后加been表被动。
Air, water and soil are being polluted in many different ways all over the world. The pollution does harm to the health of living things. Air is damaged by car lorry fumes (烟) and power stations create acid rain (雨). Acid rain destroys forests and lakes. When oil, gas and coal (...
But this is no longer true. The increase of population and the development of industry have changed that. Man is slowly poisoning his surroundings. Through the use of poison, man has polluted the land, killing the animals. By putting dirty water and chemicals into river a...