首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
We recently sailed with our research ship through the Red Sea to the Indian Ocean where we did research work for about a year. O
We recently sailed with our research ship through the Red Sea to the Indian Ocean where we did research work for about a year. O
admin
2011-01-23
39
问题
We recently sailed with our research ship through the Red Sea to the Indian Ocean where we did research work for about a year. Our main objectives (目标) were the little-known Maldive Islands. The Maldives consist of several thousand little islands, some so small that they are hardly a mile in diameter, some as large as twenty or thirty miles across. All the islands in the Maldives have developed on coral reefs (珊瑚礁).
A coral reef is a flower garden of stone, growing like a wall or like a tower from the depths, and filled with the most confusing and most colourful varieties of life. The colours are very beautiful, especially in the shallow region down to sixty feet, where some of the red and yellow light of the sun’s rays still penetrates. But most corals are greenish, brown, bluish or yellow. Coral reefs offer shelter and food to thousands of creatures. The warmer the climate, the greater the variety of species there is. In the tropics, it is easier to find, in one place, ten different species than ten specimens of the same species, and a coral reef provides ample proof of that rule. Living conditions are most favourable so that many forms are able to develop and survive in their struggle for existence. Here is wide field for the diving biologist.
The value of aqualung (水中呼吸器) diving for the biologist is that he can watch and collect on the spot. If men have not until recently ventured diving in the tropical seas, this has been mainly because of sharks. In the last twenty years I have encountered most of the really dangerous varieties of shark. There is always a certain risk, but, in general, sharks are much less dangerous than people think. You must not show fear or swim quickly away when they come into view. This attracts them, just as a cat is attracted by something on a string. Keep quiet, and, if the shark really heads towards you, then you can scare him off by swimming towards him yourself.
Large varieties of creatures can be found around a coral reef because ______ .
选项
A、the coral reef exists in regions with warm climate
B、the coral reef provides favorable living conditions for them
C、the creatures are away from the danger of being eaten by sharks
D、most sea creatures feed on the colourful coral
答案
C
解析
文章第二段说明珊瑚礁可以给许多生物提供生息地,故选C。
转载请注明原文地址:https://jikaoti.com/ti/TsDsFFFM
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Computersarenowbeingpushedintoschools.Weknowthatmultimediawillmake【C1】______easyandfun.Childrenwillhappilylear
Computersarenowbeingpushedintoschools.Weknowthatmultimediawillmake【C1】______easyandfun.Childrenwillhappilylear
PoliceinthepopularresortcityVirginiaBeachrecentlybeganoperatingvideosurveillancecameraswithcontroversialfacerec
Inthe1960stheWestCoastbecameanimportantcenterforrockmusic.LosAngelesandSouthernCaliforniaarefamousforsunshi
Whatistheconversationmainlyabout?
PoliceinthepopularresortcityVirginiaBeachrecentlybeganoperatingvideosurveillancecameraswithcontroversialfacerec
Thepatient,accordingtotheanalyst’sreport,is
Whatistheconversationmainlyabout?
Forthispart,youareallowed30minutestowriteacompositionaboutChangesinPeople’sDietaccordingtothefollowingoutli
YouarerequiredtowriteacompositiononCanRoadAccidentsBeAvoided?Inthreeparagraphswiththefirstsentenceofeachpa
随机试题
直接影响消费者的消费水平和消费范围是()
A.脑震荡B.脑挫裂伤C.颅底骨折D.颅盖骨折E.硬脑膜外血肿小脑幕切迹疝的最常见的原因是
肾癌最常见的症状是()。
被告人吴某,涉嫌贪污贿赂犯罪案件,人民检察院提起公诉。因其本人在境外,司法机关履行庭前程序后,吴某仍然不到案不出庭。那么,针对吴某的缺席审判案件,应当由哪些人民法院负责审理?()
发包就是通过从项目执行组织外部获得()而把风险转移出去。
国民经济评价中在计算土地费用时,不属于新增资源消耗的费用是()。
基金募集期限届满,封闭式基金募集的基金份额总额达到核准规模的()以上的,基金管理人向国务院证券监督管理机构提交验资报告,办理基金备案手续,并予以公告。
所谓首属群体,就是由面对面的互动所形成的,具有亲密的人际关系的社会群体。次属群体是人们为了达到一定的社会目的而建立起来的个人步人社会所需要加入的群体。根据上述定义,下列群体属于首属群体的是()。
窗体上有一个名称为Command1的命令按钮,其单击事件过程如下:PrivateSubCommand1_Click()DimsAsDoubles=0:i=1DoWhilei<6s
Peoplereaditforsomeinformation.Youtakeitifyoudon’tfeelwell.
最新回复
(
0
)