Inland waters may be grouped into two general classes: standing waters and flowing waters. As is often the case, the boundary between these two classes is not sharp and clear. A pond is an example of standing water. But most ponds are fed by springs or brooks and most have an outlet. Thus some current of changing water flows through them. On the other hand, a river is an example of flowing water. In some places, however, a river may have such a slow current that it is very difficult to detect.
Standing inland waters differ in size, in age, and in many abiotic environmental characteristics. They range in size from roadside puddles to the Caspian Sea. Puddles may last for only a few days or weeks; ponds, for a few hundred to a thousand years. In general, lakes are older, though the waters of some tropical “l(fā)akes” disappear completely during each dry season. Standing waters vary from very shallow to very deep, from clear to muddy, from fresh to salty.
In flowing waters we roughly distinguish between brooks, creeks, and rivers. The size and age of flowing waters are unimportant. Speed of flow, clearness, oxygen content, and other chemical characteristics are used by scientists in studying flowing-water ecosystems.
【小題1】According to the passage, which of the following characteristics of flowing waters is unimportant?

A.Clarity.B.Size.C.Speed of flow.D.Oxygen content.
【小題2】The word “abiotic” in paragraph 2 can best be replaced by ______.
A.nonlivingB.livingC.coastalD.inland
【小題3】Which of the following statements is true?
A.Usually the water in a river flows into a pond.
B.Scientists only study flowing-water ecosystems.
C.Usually ponds last much longer than puddles.
D.The Caspian Sea is considered as an example of flowing water.
【小題4】From this passage we may know that the distinction between standing waters and flowing waters ______.
A.depends on how people name the waters
B.is clear
C.depends on the seasons
D.is hard to make
【小題5】This passage mainly tells us that ______.
A.there are two major classes of inland waters
B.lakes and rivers are flowing waters
C.a(chǎn)ge and size of flowing waters are important
D.ponds and brooks are standing waters


【小題1】B
【小題2】A
【小題3】C
【小題4】D
【小題5】A    

解析試題分析:文章介紹了內(nèi)陸有兩大水域,靜止的水域和流動(dòng)的水域,具體介紹了它們不同,但是確切的區(qū)分二者還是很難的。
【小題1】細(xì)節(jié)題:從文章第三段的句子:The size and age of flowing waters are unimportant.可知流動(dòng)的水的大小是不重要的,選B
【小題2】猜詞題:從文章第二段的句子:Standing inland waters differ in size, in age, and in many abiotic environmental characteristics.因?yàn)槭庆o止的內(nèi)陸水域,可知“abiotic” 是“無(wú)生命的”,選A
【小題3】細(xì)節(jié)題:從文章第二段的句子:Puddles may last for only a few days or weeks; ponds, for a few hundred to a thousand years. 可知水池比水坑持續(xù)時(shí)間長(zhǎng),選C
【小題4】細(xì)節(jié)題:從第一段的句子:Inland waters may be grouped into two general classes: standing waters and flowing waters. As is often the case, the boundary between these two classes is not sharp and clear. 可知靜止的水和流動(dòng)的水很難界定,選D
【小題5】主旨題:從全篇文章和第一段的句子:可知這篇文章講的是內(nèi)陸有兩大水域,選A    
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A.the history of American music
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