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The huge Florida wetland known as the Everglades is a slow-moving river 80 kilometres wide but only a few centimeters deep. People call the Everglades a “river of grass” because sawgrass covers most of it. Sawgrass is not really grass. It is a plant that has leaves edged with tiny sharp teeth that can easily cut through clothes—and skin!
Travel in the Everglades is difficult. You cannot walk through shallow water because the sawgrass will cut you. The water is too shallow for regular boats. So, we use an airboat. An airboat is a flat, open boat. Like an airplane, it has a big propeller to move it. The propeller is fixed on the rear of the boat. It makes a tremendous noise, but it does the job. The boat skims along the water’s surface. Although we can still get lost in an airboat, at least we are above the alligators(短吻鳄).
While hundreds of different kinds of animals live in the Everglades, the most famous is surely the alligator. Once endangered, alligators are now protected within Everglades National Park. Visitors are likely to see them both on land and in water.
For a long time, dangers have threatened the Everglades. Around 1900, some people felt this precious wetland should be drained (排干). They said it was just a big swamp and not good for anything. In the 1920s, there was a land boom in Florida. People wanted to build homes everywhere, including in the Everglades. They built canals, levees (防洪堤), and other water systems that stopped the rivers flowing into the Everglades. Factories were built near rivers that flowed into the wetland. These factories dumped poisonous waste that damaged the Everglades ecosystem.
?People are now working to preserve the Everglades National Park for the future. Right now, one big problem is the paperbark tree. This tree is an invader from Australia.
Paperbark trees soak up a lot of water. In the early 1900s, people brought them to Florida because they thought they would help drain the Everglades. However, the invaders adapted too well. Paperbark trees have taken over hundreds of thousands of acres of the Everglades and killed other trees. Scientists are cutting down these invaders or spraying them with herbicides (除草剂) to kill them.
【小题1】Which helps to explain why it is difficult to travel in Everglades?

A.Airboats may make a very big noise.
B.You may get lost when passing through.
C.Paperbark trees soak up too much water there.
D.Many different kinds of animals are to be protected.
【小题2】Why do people use airboats instead of normal boats?
A.They have big propellers to move them faster than alligators.
B.The propeller makes loud noise so as to scare alligators.
C.Their flat bottom can skim along the water surface.
D.They can watch alligators without hurting them.
【小题3】The following measures were taken to drain the Everglades except that people______.
A.built canals and levees to stop the rivers flowing into Everglades
B.built factories near rivers that flowed into the wetland
C.brought Paperbark to soak up water in Everglades
D.are cutting down these Paperbark trees?
【小题4】The underlined word "invader" probably means something______.
A.that moves in from another place
B.that enters and takes control
C.that has been brought in
D.that is in danger


【小题1】B
【小题2】C
【小题3】D
【小题4】B

解析试题分析:本文介绍了美国著名的佛罗里达湿地Everglades,以及人们保护这块湿地的有关情况。
【小题1】B 细节题。根据第二段第5行Although we can still get lost in an airboat, at least we are above the alligators(短吻鳄).说明迷路仍然是一个危险,故B正确。
【小题2】C 细节题。根据第二段4,5行It makes a tremendous noise, but it does the job. The boat skims along the water’s surface.说明这种船能沿着水面前行,不会受到sawgrass的影响,故C正确。
【小题3】D 细节题。根据文章2,3段People wanted to build homes everywhere, including in the Everglades. They built canals, levees (防洪堤), and other water systems that stopped the rivers flowing into the Everglades. Factories were built near rivers that flowed into the wetland
Right now, one big problem is the paperbark tree. This tree is an invader from Australia.说明ABC三项都是人们所采取的措施,只有D项不是,D项中的砍树,那是因为这种树吸收水分太厉害了,导致其它植物的死亡。故D项符合本题要求。
【小题4】B 推理题。根据本句Right now, one big problem is the paperbark tree. This tree is an invader from Australia.说明这种树是从澳大利亚引进过来的,根据下一段,说明这种外来的树种适应性很强,吸水性很强导致其它植物死亡了,故该词是指入侵者,故B正确。
考点:考查地理类短文阅读
点评:人们在保护Everglades的同时也给它带来了很多的麻烦,如引进了Paperbark tree。考查细节题较多,如前3题都是。答题时在文章找到对应的地方,用笔进行标记,这有利于后期有时间检查时可以立刻找到答案的位置。仔细理解作者所讲的意思,再结合选项,通过排除法和自己对全文的把握,选出正确答案。

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