问题 综合

读田纳西河流域在美国本土的位置图和田纳西河流域电站分布图,完成下列问题。

(1)试分析田纳西河流域水能资源丰富的原因。(5分)

(2)田纳西河流域水能丰富,为什么还要建火电站和核电站?(5分)

(3)田纳西河流域主要的交通运输方式是什么?限制其发展的条件有哪些?(5分)

(4)为什么梯级开发成为田纳西河流域综合开发的核心?(8分)

答案

小题1:地形多山,地势起伏大,落差大,水流急;亚热带湿润气候,降水量丰富,河流水量大。

小题2:流域内水、煤炭资源丰富,发展火电是变资源优势为经济优势;河流流量季节变化大,水位不稳定,发展火电和核电,可以弥补河流枯水期发电量的不足。

小题3:水运(河运、内河航运)

地形起伏大,落差大,水流急;降水季节变化较大,水量不稳定

小题4:①梯级开发分段修建水库和船闸,能改善不稳定的径流,使各段水位相对平稳,利于通航。②水库建成之后,可以抵御洪涝灾害,蓄水后利用落差可以发电,电力充足,用于冶金工业,既保护了森林,又减少了二氧化碳的排放,使环境质量得到改善。③水源充足,小气候得以改善,地力和植被都可以得到恢复。反过来,植被得到恢复,又可以改善不稳定的径流。④水库储存的水源,可以解决农业灌溉所需,对农业生产十分有利。

题目分析:

小题1:河流的水能资源主要从河流的流量和落差两方面分析。

小题2:主要结合田纳西河流域水能开发的不利条件和该地区发展火电和核电的有利条件等方面分析。

小题3:由于田纳西河流域水系发达、河流流量较大,无冰期,故主要的运输方式为水运,其不利条件主要从河流落差和河流流量变化较大等方面分析。

小题4:河流梯级开发目的是实现流域内社会、经济、生态效益的统一,可结合河流梯级开发对发电、航运、防洪、生态环境保护等多方面的综合效益分析。

点评:本题解题的关键是掌握河流流量开发的一般思维,注意调用课本关于田纳西河流域开发的基本概况分析。本题还可结合我国河流的综合开发与治理设计试题,培养学生的知识迁移、应用能力。

选择题
阅读理解

Long ago, in days of the Roman Empire, people used to believe a god of farmings called “Saturn”. They believed that Saturn could make the weather good or bad, and that he had the power to control how much rain would fall.

Before a Roman farmer would plant his fields, he would try to get Saturn to give him good weather. He believed that if he killed an animal for Saturn, that would make Saturn happy. Then Saturn would make sure that the weather was good.

Not only did the people name a planet after Saturn but they also name a day of the week after him. They called this day “Saturni dies”, Latin words which mean “day of Saturn”. In English those words became Saturday.

6. What was Saturn believed to be in charge of?

A. Rainfall.    B. The power of nature.   C. Farming.    D. Days in a week.

7. Why did a Roman farmer kill an animal before planting his fields?

Because      .

A. killing an animal would bring him good luck

B. Saturn enjoyed eating animals

C. Saturn was happy to see animals being killed

D. he wanted to please Saturn so that Saturn would make the weather good for his planting

8. Which of the following is NOT TRUE?

A. Saturn is also the name of planet.

B. The Roman people used to believe Saturn to be their god.

C. Saturn was named for the last day of the week.

D. Saturn had three meanings.

9. What’s the aim of the author in writing this passage?

A. How the Romans worshipped (崇拜) Saturn.

B. Why the Romans believed in Saturn.

C. The different meanings of the word Saturn.

D. How Saturday got its name.