4.
More than one billion people around the world do not have clean drinking water.Their water supplies are unsafe because of natural or man-made pollution,such as industrial chemicals or human and animal wastes.Also water-related diseases(与水有关的病菌)kill millions of people each year,mostly children.
Two years ago the United States National Academy of Sciences launched the"Safe Drinking Water Is Essential"site.It was set up to provide high-quality scientific information about improving the safety of drinking water supplies.The information is provided in five languages:English,French,Spanish,Chinese and Japanese.
Many organizations will share information about the web resource(网络资源) with policy(政策)makers in their countries.The information will help users learn about the causes of unsafe drinking water and technologies that can improve water quality.
Peter Glick is a member of the scientific committee (科学委员会)that developed the website.He says now many people can't get clean drinking water.But the problem can be solved.Education is important,and the hope is that this new Internet tool can be part of the solution.
51.The water supplies are not safe becauseB.
A.people make the water clean B.there is natural or man-made pollution
C.animal bodies are thrown into water D.there are no water-related diseases
52.What does the underlined word"launched"mean in the second paragraph?C
A.取消 B.改善.C.创办 D.改变
53.The information is provided inB.
A.English,French,Indian,Chinese and Japanese
B.English,French,Spanish,Chinese and Japanese
C.English,French,Spanish,Chinese and Russian
D.English,French,Spanish,Chinese and Australian
54.Many organizations willD.
A.provide money for poor people B.only help people to find clean water
C.supply the poor with clean water D.share information with policy makers
55.According to Peter Glick,human beingsA.
A.can solve the water problem B.should get information about Internet
C.learn how to speak English D.need to learn more about the world.