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
考研
Imagine fishermen walking down to the seashore, ready to carry out their early morning routine of preparing their boats and net.
Imagine fishermen walking down to the seashore, ready to carry out their early morning routine of preparing their boats and net.
admin
2012-05-19
67
问题
Imagine fishermen walking down to the seashore, ready to carry out their early morning routine of preparing their boats and net.【C1】______they hope for a good catch of fish. But to their 【C2】______, a horrible sight meets their still sleepy eyes. Thousands of fish have been washed【C3】______dead. The cause of this mass destruction? A red tide!
Red tides are a global【C4】______. They have been observed on both the Atlantic and the Pacific coasts of the United States and Canada. They have also【C5】______in many other places. Though relatively few people are【C6】______them, red tides are not new.
In the Philippines, a red tide was first seen in the province of Bataan in 1908. Since then, red tides have been seen in many other【C7】______. A Philippines red tide expert told us that "【C8】______the fish kills, the Philippines has documented 1, 926 cases of dead shellfish poisoning caused by red tides. "
The term "red tide"【C9】______the discoloration of water that sometimes occurs in certain areas of the ocean or sea. Although the color is often red, it may also be【C10】______of brown or yellow. The World Book Encyclopedia reports that "the discolored areas may range from【C11】______a few square yards to more than 2,600 square kilometers. "
What causes such discoloration? Red tides are generally caused by several【C12】______of single-celled organisms. These tiny organisms have hair-like projections which they use to【C13】______themselves in water. There are about 2,000 varieties of these organisms, 30 of which carry poisonous【C14】______. These minute organisms usually stay in warm waters with high content of salt.
A red tide occurs when there is a sudden and rapid【C15】______of these organisms. The concentration of these organisms may【C16】______to 50,000,000 per quart of water! Although scientists do not fully understand why this happens, it is known that these organisms【C17】______when certain conditions simultaneously affect the water. These include abnormal weather, 【C18】______temperatures, an oversupply of nutrients in the water, a generous【C19】______sunlight, and favorable water currents. When a heavy rainfall occurs, minerals and other nutrients are sometimes washed【C20】______the land into coastal water. These nutrients can contribute to the breeding of the organisms. The result? Red tides!
【C18】
选项
A、optimum
B、minimum
C、maximum
D、momentum
答案
A
解析
转载请注明原文地址:https://www.kaotiyun.com/show/38p4777K
0
考研英语一
相关试题推荐
WhichofthefollowingistrueoftheintroductionofteaintoBritain?PeopleinEuropebegantodrinkteawithmilkbecause_
Thewinnertakesall,itiswidelysupposedincomputingcircles.Indeed,geekshavecoinedaword,"Googlearchy",forthewayi
OnthemorningofApril15,38,500worshippersfromallovertheworldwilldescenduponthetinytownofHopkinton,Massachuset
Title:PeopleShouldbeRewardedAccordingtoAbility,ortoAgeandExperienceYourcompositionshouldbebasedontheoutline
EuropeansandAmericansalikehavecertainromanticnotionsaboutSweden.Weimagineitasalandofliberal-mindedpeoplelivin
Youaregoingtoreadatextaboute-mail,followedbyalistofdetailexplanationsorcitedstatements.Choosethebestrelate
Inthetwodecadesbetween1929and1949,sculptureintheUnitedStatessustainedwhatwasprobablythegreatestexpansionins
Accordingtothepassage,CDCisanorganizationthatWeknowfromtheauthor’ssuggestionsthat
Imaginebeingaskedtospendtwelveorsoyearsofyourlifeinasocietywhichconsistedonlyofmembersofyourownsex.Howw
随机试题
关于供热管网工程试运行的说法,错误的有()。
会计人员遵守会计职业道德是其晋升、晋级、聘任专业技术职务、表彰奖励的主要考核依据。()
ABC公司今年的每股净利是1元,分配股利0.3元/股,该公司净利润和股利的增长率都是5%,β值为1.1。政府债券利率为3.5%,股票市场的平均收益率为8.5%。问该公司的内在市盈率是()。
阅读下列片段。试回答有关问题。体态语是人们在交际过程中人体任何一部分辅助言语交流的表情,行为或举止。化学教师在进行课堂教学时。在运用有声语言的同时,常常伴随着相应的体态语,它正以独特的魅力成为课堂教学中不可忽略的辅助手段,也越来越受到人们的广泛关注。根据
YouwillhearaspeechbyIvoJupa,whomadeuseofshortmessageservicetoraisemoneyforcharity.Asyoulisten,answerthe
Banknotesareonlypaper,______representvalue.
Accordingtothestudy,whatisthewaythebabiesreacttodifferentpeople?
What’saUniversityEducationWorth?I.Studentsgraduatingwithlargerandlargerdebts-UKuniversitiesbegantocharge【
It’smypleasurethiseveningtowelcomeallthegueststothiscelebrationofChineseNewYearhere.Iextendaspecialwelcome
A、Itswaterwaysarebeingincreasinglypolluted.B、Peoplecannotgetaroundwithoutusingboats.C、Itattractslargenumbersof
最新回复
(
0
)