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
26
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/3310892.html
相关试题推荐
ForfiveyearsIhavemaintainedournation’ssolidcommitmenttoscientific
ResearchershavefoundthevirusincivetcatsatalivefoodmarketinChina,b
Inthepastfewyears,I’vetaughtnonfictionwritingtoundergraduatesandg
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
随机试题
TheMillenniumSeedBankProject[img]2018m1x/ct_eyyjscm_eyyjs
Athirdoftheplanet’slandisseverelydegradedandfertilesoilisbeingl
患者,男,51岁。胸骨后剧烈疼痛4小时,伴大汗淋漓,血压80/60mmHg,心率
近年来,许多城市都重视大型物流园区的建设。据此完成下题。 下列最适宜布局物流园
患者,男,50岁。咳喘20余年,现咳嗽痰少,口燥咽干,形体消瘦,腰膝酸软,颧红盗
高层建筑的雨水管一般要用()。 A、给水铸铁管 B、排水铸铁管 C
下列关于城市道路系统的表述,错误的是( )。A.方格网式道路系统适用于地形平坦
康德把教育分为四个部分,其中不包括( )A.体育 B.管束 C.训育 D
在某银行计息余额表中,某工厂活期存款2月末的累计应计息积数为600000,同年3
设备租赁与购置方案分析的步骤中,定性分析筛选方案包括()。A、分析企业生产经营
最新回复
(
0
)