Question

Pigs are always considered dirty animals because they roll in mud．But in fact they prefer  being quite clean．They cover themselves with mud to help stay cool．During cooler weather,  they prefer to stay clean．So do elephants, who also cover themselves in dust or mud to keep cool．When they find a place with clean water they will take a bath，using their long noses to give  themselves—or each other—a nice shower
Some animals use dust to get clean．Chinchillas (南美洲栗鼠) have very fine fur． They don’t like to take water baths because water is not warm enough for them．So, instead, they roll  around in fine dust．The dust helps to keep their fur and skin dry．This protects them from disease
Usually, a small bird is a light meal for a crocodile．But when a crocodile wants its teeth  cleaned．it lies on the ground with its mouth open．The crocodile bird goes in and picks out any  parasites(寄生虫)between the crocodile’s teeth or under its tongue．The crocodile gets its mouth cleaned，and the crocodile bird gets dinner．
You wouldn’t think fish would need baths．But some undersea parasites live under the  fish’s skin．“Cleaner” fish，like the wrasse(隆头鱼)，help take them away．The wrasse stands on its head and dances to signal a big fish that it is ready to go into the cleaning business．The big fish will stop moving and open its mouth wide so the wrasse can swim inside and pick out  parasites and bits of food．
【小题1】The passage is mainly about how animals __________．

A．stay clean

B．help each other

C．get their food

D．Take baths

【小题2】What can we learn from the first paragraph about pigs?

A．They can help each other take baths．

B．They are dirtier during cooler weather．

C．They prefer taking baths to rolling in mud．

D．They like to stay cool and clean．

【小题3】Chinchillas use dust to get clean for the following reasons EXCEPT that ________．

A．dust can dry their fur and skin

B．They are not good at swimming

C．Water is too cold for them

D．Dust is good for their health

【小题4】From Paragraphs 3 and 4，we can know that __________．

A．Some animals can get clean from others’ help

B．Most animals are friendly to each other

C．Small animals couldn’t get food from big ones

D．All of the animals prefer to stay clean

【小题5】We can infer from the last paragraph that the wrasse_____.

A．is often eaten by other fish

B．1ikes under other fish’s skin

C．is a small kind of fish

D．1ikes taking baths

Answer 1

【小题1】A
【小题2】D
【小题3】B
【小题4】A
【小题5】C

解析试题分析：本文主要讲述的是很多动物也很喜欢干净，不过不同的动物保持清洁的方式是不一样的。
【小题1】A 主旨大意题。本文主要讲述了不同的动物保持清洁的不同的方法，有的动物使用泥浆，有的短文使用其它的动物，如鳄鱼等。故A正确。
【小题2】D 细节题。根据第一段2,3行They cover themselves with mud to help stay cool．During cooler weather,  they prefer to stay clean．说明猪也喜欢干净，故D正确。
【小题3】B 细节题。根据文章第二段Some animals use dust to get clean．Chinchillas (南美洲栗鼠) have very fine fur． They don’t like to take water baths because water is not warm enough for them．So, instead, they roll  around in fine dust．The dust helps to keep their fur and skin dry．This protects them from disease可知ACD都是他们使用灰尘来保持清洁的原因，只有B项没有提及。
【小题4】A 段落大意题。在文章第三段里讲述了鳄鱼借The crocodile bird进行口腔的清洁；一些大鱼借the wrasse(隆头鱼)来保持清洁。故讲述的是不同的动物靠其它的动物保持清洁的故事。故A正确。
【小题5】C 推断题。根据文章最后“Cleaner” fish，like the wrasse(隆头鱼)，help take them away．The wrasse stands on its head and dances to signal a big fish that it is ready to go into the cleaning business．The big fish will stop moving and open its mouth wide so the wrasse can swim inside and pick out  parasites and bits of food．可知这种鱼可以进入其它的鱼的口腔，说明他们的体型较小，故C正确。
考点：考查自然知识类短文阅读
点评：本文讲述的是不同的动物保持清洁的不同方式。文章基本上是考查细节题，对此类题型考生可以首先从问题中找到关键词，然后以此为线索，运用略读及查阅的技巧在文中迅速寻找这一细节，找到后再把这一部分内容仔细阅读一遍，仔细比较所给选项与文中细节的细微区别，在准确理解细节的前提下，最后确定最佳答案。