首页
登录
职称英语
It sounds like a science fiction, but researchers say it’s a scientific fact
It sounds like a science fiction, but researchers say it’s a scientific fact
游客
2023-12-27
8
管理
问题
It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick, too.
The name given to this single-cell organism, or dinoflagellate, is Pfiesteria piscimorte- literally, "fish killer. " It was discovered at North Carolina State University in 1988, but at the same time, few scientists believed in its existence, much less in its highly unusual predatory nature. But ongoing research has led to international acknowledgment of the phenomenon and, recently, research funding.
Seemingly prompted by an unknown substance secreted by fish, the aggressive creature swims into action. It sends neurotoxins into the water and air, paralyzing a fish’s nervous system, and causing it to gasp for air at the surface. Eventually the fish suffocates. The killer dinoflagellate then attaches itself to the fish and begins sucking away at its flesh. This macabre scenario may help solve several sea mysteries, such as why fishermen report seeing "fish walks" (fish trying to leave the water) and pools of dead fish with holes eaten through them.
Whether humans are affected by the dinoflagellate’s toxin remains to be seen. Researchers think it’s unlikely eating fresh fish are in danger, but anyone with frequent exposure to the creature could be in peril. Several researchers working with the algae have reported bouts of memory loss and disorientation.
To understand the killer algae further, scientists must fully characterize their toxin and determine what stimulates them to attack. They also need to know if the algae are hurting fish populations, and whether pollutants make them more likely to attack. [br] Researchers think that it is ______.
选项
A、safe to eat fresh fish
B、dangerous to get close to the algae
C、safe to be near the algae
D、dangerous to expose the algae
答案
B
解析
细节题型见第四段第二句:Researchers think it’s unlikely eating flesh fish are in danger, but anyone with frequent exposure to the creature could be in peril. (研究人员认为吃新鲜的鱼未必会有危险,但如果经常接触这种生物可能会冒风险),因此B为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3310534.html
相关试题推荐
Toreplicatethatsituation,theresearcherspropeltheirvesseldirectlyintoo
Althoughthathappenedinthisdevelopedcountrysoundslikesciencefiction,it
Partofhersuccesssoundspedestrian:puttinginexceptionallylonghourstoge
Hisstorywhichsoundsimpossiblecoincideswiththeteacher’s.A、occursatthes
Neurotechnologyhaslongbeenafavoriteofscience-fictionwriters.InNeur
Neurotechnologyhaslongbeenafavoriteofscience-fictionwriters.InNeur
Neurotechnologyhaslongbeenafavoriteofscience-fictionwriters.InNeur
Neurotechnologyhaslongbeenafavoriteofscience-fictionwriters.InNeur
Neurotechnologyhaslongbeenafavoriteofscience-fictionwriters.InNeur
NeitherLorillardnortheresearcherswhostudiedtheworkersintheeastparto
随机试题
WaystoTakeIttotheNextLevel’Nom
SomeProblemsFacingLearnersofEnglishAlthoughmanyEnglishle
Itisoftensaidthatpolitenesscostsnothing.Infact,itseemsthatalit
Imagineyouwenttoarestaurantwithadate;hadaburger,paidwithacred
学习《爱莲说》,教师要求学生找出其他描写荷花的古诗,下列不符合要求的是()A
2019年5月,全国12358价格监管平台受理价格举报、投诉、咨询共计37576
某资金实力较强的投资者对集合资金信托计划较感兴趣,为此咨询助理理财规划师,助理理
项目资本金可以用货币出资,也可以用( )作价出资。A.实物 B.工业产权
在工程招投标的过程中,投标人完全不应承担的风险为()。A.技术风险 B.
治疗等渗性脱水理想的液体是A.5%碳酸氢钠 B.等渗盐水 C.平衡盐溶液
最新回复
(
0
)