阅读理解
For the people living in the Nile Basin, the river is their life.This 6,825 km waterway, whose
watershed (流域) covers three million square kilometers, flows through mountains, woodlands,
lakes and deserts.Its potential for fishing, tourism and shipping is great-but so are its challenges.
Water shortage, already serious in Egypt and Sudan, will soon influence several other countries
in the watershed as well.Today, about 160 million people depend on the Nile River for their living.
Within the next 25 years, the district's population is expected to double, adding to the demand
brought about by growth in industry and agriculture.The frequent drought (干旱) adds to the
urgency.
Water quality is also a problem.Precious soil is washed out to se
a.Wastes from industry and
agriculture create pollution.Higher concentrations of salt influence irrigated soils.Waterborne
diseases continue unchecked.In areas where it's hot and damp, water hyacinths choke off lakes,
dams and other sections of the river, making it difficult for fishing and other businesses to move
forward.
Native people along the narrow area of farmland have watched the sand move closer day by
day.They've seen the river change course, and their only source (来源) of water thickened with
mud.They're very poor and have few choices.
But a new program, the Nile Basin Initiative (NBI), is offering very practical assistance.The
program is more than just a watermanagement project.It's a plan for the social and economic
development of a vast district: it concentrates on the needs of the poorest of the poor and the
environment that supports them.
These are whole ecosystem problems, calling for united solutions (解决办法). Half the Nile
Basin's countries are among the world's poorest nations; yet, somehow, they must find the resources,
skills and political will to overcome these challenges.
1. What are the great challenges the Nile Basin faces?
A. The development of shipping industry.
B. Overfishing of native people.
C. Water shortage and water quality.
D. Increasing population and tourism.
2. The underlined word "hyacinths" ( in Paragraph 3 ) refers to"________".
A. animals
B. plants
C. rocks
D. salts
3. The program NBI is mainly aimed at ________.
A. preventing water pollution
B. changing the river course
C. improving living conditions of the poor
D. preventing land from becoming desert
4. What would be the best title of this passage?
A. People's Life in Egypt and Sudan
B. Frequent Drought in Egypt and Sudan
C. The Poorest Countries in the Nile Basin
D. The Ecosystem Problems in the Nile Basin
H2↑+Cl2↑+2OH-