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
55
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] The word "literally" underlined in Paragraph 2 most probably means ______.
选项
A、namely
B、superficially
C、imaginatively
D、actually
答案
D
解析
词义题型见第二段第一句:The name given to this single-cell organism,or dinoflagellate,is Pfiesteria piscimorte-literally,"fish killer." 可知this single-cell organism即 dinoflagellate,就是Pfiesteria piscimorte,也即“fish killer”;因指的都是一种东西,因此D为答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3310529.html
相关试题推荐
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
Whatdoeslayaboutsmeaninthefollowingsentence"Thatsoundslikeagoodthin
Whatdotheresearchersmeanwhentheysaytheoverweightdogs"goforthesure
AccordingtoMalawi’sMinisterofEducation,ScienceandTechnology,whatwillb
Whatisthelimitationofpsychologicalscience?A、Itfailstosupplythepublic
Whatmethodisusedinthestudy?A、Physicalscience.B、Psychologicalscience.C、
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
Wemayhavesuspecteditalready,butnowthescience【C1】______:unmarrieda
随机试题
Whereistheman?[originaltext]M:Excuseme.IsthisroadtoTurner’sStreet?W
[img]2018m9s/ct_etoefz_etoeflistz_201808_0051[/img][br]Whatevidenceindicated
Thedisagreementamongthefamilymembers______overwithtime.A、curedB、secured
Startingaconversationisaseasyforsomepeopleaseatingandbreathing.H
对胆道感染有较好疗效的药物是A.SMZ B.青霉素 C.头孢氨苄 D.红霉
患儿女,1.患儿男,12岁。3年前患肾病综合征,经治疗已缓解。近日因劳累后出现水
2015年,我国规模以上电子信息产业企业个数6.08万家,其中电子信息制造企业1
下列关于教育形态的说法中,错误的是()。 A.根据教育的形式化程度,可将
“今天工作不努力,明天努力找工作”,这句话所蕴含的意思是()。 (A)不要把
(2016年真题)根据《中华人民共和国水污染防治法》饮用水水源保护有关规定,在饮
最新回复
(
0
)