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
It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are pa
It sounds like a science fiction, but researchers say it’s a scientific fact: Microscopic organisms dubbed "killer algae" are pa
admin
2011-01-11
40
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.
Which of the following questions is answered according to the information given in the passage?
选项
A、What is the toxin used by the fish killer?
B、Who first discovered the organism?
C、How does the fish killer paralyze fish?
D、How many fishes can the organism kill each day?
答案
C
解析
是非题型第一段中提到the fish killer有toxins,但没提它使用何种toxins,排除选项A;第二段中提到the fish killer于1988年在大学被发现,但没提及是谁发现的,排除选项B;选项D在文中没有提及;因此C为答案(在第三段第二句中谈到the fish killer向水中、空气中释放神经毒素,麻痹了鱼类的神经系统,使得鱼类钻到水面呼吸;最终鱼类窒息而死;然后它就附着于鱼身食其肉)。
转载请注明原文地址:https://kaotiyun.com/show/cUgO777K
本试题收录于:
CATTI二级笔译综合能力题库翻译专业资格(CATTI)分类
0
CATTI二级笔译综合能力
翻译专业资格(CATTI)
相关试题推荐
Despitealltheadssingingthepraisesofthenewproduct,sheremained______aboutitsquality.
Abouttwo-thirdsoftheworld’spopulationisexpectedtoliveincitiesbytheyear2020and,accordingtotheUnitedNations,
Gregorwasagiftedviolinistwhowasdiligentaboutpracticing,showingadedicationtohisartthatevensurpassedhistalent.
Artificialflowersareusedforscientificaswellasfordecorativepurpose.Theyaremadefromavarietyofmaterials,suchas
Thesynthesisofourvariousideascreatedatrulyuniquemarketingstrategyforourclients.
ItisablazingmorninginthePermianbasin,inwestTexas,America’smostproductiveoilfield.Onthehighplainsariggnaws
Partofhersuccesssoundspedestrian:puttinginexceptionallylonghourstogettheattentionofherbosses.
Finally,bythesame_________,thereisaneedforongoingcommitmentbytheinternationalcommunityinpost-independenceEastT
IknowwhatyouwilljoinmeinexpressingourdeepcondolencestothepeopleofHaitiandourgratitudetothemanywhoarerus
随机试题
下列哪项是骨髓移植造血功能重建的标志
预防佝偻病,每天需要口服维生素
A、 B、 C、 D、 D本题正确答案为D。第一行中每个图形的对称轴的数目分别是1、2、1;第二行中每个图形的对称轴的数目分别是1,2、1;第三行中前两个图形的对称轴数目分别是1、2,故问号处的图形的对称轴的
《刑事诉讼法》第3条第1款规定:“对刑事案件的侦查、拘留、执行逮捕、预审,由公安机关负责。检察、批准逮捕、检察机关直接受理的案件的侦查、提起公诉,由人民检察院负责。审判由人民法院负责。除法律特别规定的以外,其他任何机关、团体和个人都无权行使这些权力。”对于
解决物业管理的方向性问题的管理基本职能是()。
在妇女社会工作中,应用社会工作的个案、小组和社区方法时,一定要加入(),遵循妇女社会工作的实践原则。
屈原:我国最早的伟大诗人,他创造了“__________”这一新诗体,开创了我国诗歌的浪漫主义风格。
李某系某市企业员工,工作能力极差,严重影响企业业绩,受到上级领导及其他同事的谴责。某日清晨,第一位到岗清洁的保洁人员发现李某死于企业工位。经过人民法院的审判,最终谋杀其父的李某女儿被判处死刑缓期两年执行,请问公安机关在接到生效的判决书后,应在多长时间内
有关系模式A(C,T,H,R,S),其中各属性的含义是:C:课程T:教员H:上课时间R:教室S:学生根据语义有如下函数依赖集:F={C→T,(H,R)→C,(H,T)→R,(H,S)→R}关系
Quotationsandsayingsarepartofourlanguageandourwaysoflife.【M1】______AsthepoetEmersonsaid,weusethembynecess
最新回复
(
0
)