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
RED TIDES Different events can change the balance of sea life./Red fides are an example./These can happen in oceans, rivers
RED TIDES Different events can change the balance of sea life./Red fides are an example./These can happen in oceans, rivers
admin
2013-09-28
24
问题
RED TIDES
Different events can change the balance of sea life./Red fides are an example./These can happen in oceans, rivers or lakes, anywhere in the world./What happens is that algae suddenly increase in numbers./ Algae are sit. e-celled organisms./They are a normal part of sea life./
As they spread, or bloom, the water may turn red or brown./Sometimes the water does not change color at all./But deadly algae could still be present./
Some kinds of algae produce a strong poison./This can build up in shellfish that eat the algae/and make them poisonous, but not kill them./Other kinds of algae may kill sea life by reducing oxygen levels in the water./ In some red fides, thonsands of dead fish appear on beaches./
Scientists do not know exactly why red tides happen./But they say a combination of conditions all play apart./These include water temperature, nutrients in the water and water flow./Pollution could also play a part/
选项
答案
RED TIDES Different events can change the balance of sea life./Red fides are an example./These can happen in oceans, rivers or lakes, anywhere in the world./What happens is that algae suddenly increase in numbers./ Algae are sit. e-celled organisms./They are a normal part of sea life./ As they spread, or bloom, the water may turn red or brown./Sometimes the water does not change color at all./But deadly algae could still be present./ Some kinds of algae produce a strong poison./This can build up in shellfish that eat the algae/and make them poisonous, but not kill them./Other kinds of algae may kill sea life by reducing oxygen levels in the water./ In some red fides, thonsands of dead fish appear on beaches./ Scientists do not know exactly why red tides happen./But they say a combination of conditions all play apart./These include water temperature, nutrients in the water and water flow./Pollution could also play a part/
解析
转载请注明原文地址:https://kaotiyun.com/show/LxLK777K
0
专业英语四级
相关试题推荐
Ifweviewascienceasabodyofsystematizedknowledge,thenchemistryisusuallycalledanaturalsciencebecauseit【C1】____
TheSpringFestivalisatraditionalChinesefestival.Oneofitsespeciallyexcitingritualsforchildrenisgetting"LuckyMor
Inthedigitalrealm,thingsseemalwaystohappenthewrongwayround.WhereasGooglehashurriedtoscanbooksintoitsdigita
TheDragonBoatFestival(端午节)isoneoftheimportantnationalfestivalsinChina.WriteonANSWERSHEETTHREEacompositionofa
Whichofthefollowingistheauthor’smainpurposeinwritingthepassage?Beforethechange,Harvard______.
Whichisnotmentionedinthepassageasanaspectthatfarmingactivitiesaredamaging?
Onlywhenwehaveweightedallthefactorsinvolved______decidewhenwouldbethebesttimetostart.
Jasonisusuallyundertheweather,buthisrobustbrother______.
WheredidAmericanandRussiannegotiatorsmeettodiscussadealforakeynucleardisarmamenttreaty?
Whydothetwocountriesexchangethelistofnuclearcenters?
随机试题
箱体类工件划线时怎样选择基准?
何谓内环境的稳态?
A.高流量乙醇湿化给氧B.中流量间歇性给氧C.给予面罩加压纯氧D.低流量持续给氧E.低流量间歇给氧急性心肌梗死()
患者,女,35岁。高处坠落,左枕着地,进行性意识障碍,1小时后右侧瞳孔散大。最有效的治疗方法是
(2013年)关于具体行政行为的合法性与效力,下列哪些说法是正确的?
某市混凝土公司新建临时搅拌站,在试运行期间通过暗管将污水直接排放到周边,严重破坏当地环境。公司经理还指派员工潜入当地环境监测站内,用棉纱堵塞空气采集器,造成自动监测数据多次出现异常。有关部门对其处罚后,公司生产经营发生严重困难,拟裁员20人以上。
新学期伊始,高老师开设了素描写生课程,第一节的《静物写生》课,高老师选用了演示法教学。下列教学方法中不属于演示法的是()。
【材料一】亚太经合组织第十九次领导人非正式会议于2011年11月13日在美国夏威夷州首府檀香山举行。这次会议以“紧密联系的区域经济”为主题,主要讨论亚太地区经济增长、区域经济一体化、绿色增长、能源安全、规制合作等议题。国家主席胡锦涛出席会议并发表重要讲
CementwasseldomusedinbuildingduringtheMiddleAges.
(1)AnothermilestoneonthejourneytowardsdigitalcashwaspassedonNovember13th.Thatdatemarkedtheemergencefrombeta-
最新回复
(
0
)