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
11
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.
The passage is primarily concerned with ______.
选项
A、informing readers of different sea creatures
B、describing predatory microscopic organisms
C、solving some long-lasting mysteries about the sea
D、discussing the environment for various fishes
答案
B
解析
主旨题型通读全文可知本文第一段是本文的主旨:讲的是a scientific fact:Microscopic organisms are paralyzing fish with unknown toxins and then eating away at their flesh. They might be making people sick too. 因此整体讲的是Microscopic organisms, B为答案。(第一段讲的是:听上去像一篇科幻小说,但研究人员说这是一个科学事实:一种绰号为“藻类杀手”的微观生物用一种不知名的(生物)毒素麻痹鱼类,然后食用它们的肉。它们也可能会使人类得病。)
转载请注明原文地址:https://kaotiyun.com/show/gJgO777K
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
Artificialflowersareusedforscientificaswellasfordecorativepurpose.Theyaremadefromavarietyofmaterials,suchas
Theyoungcoupleusedtoquarrelalot,buttheyarenowcompletely______witheachother.
ThenumberofimmigrantslivingintheUSAhasrisenby16percentoverthelastfiveyears,fueledlargelybyrecentarrivalsf
TheReputationInstitute,aconsultancy,hasrevealedtheresultsofitslatest"Reptrack"CorporateReputationSurveyVariouss
Researchrevealsthatqualityafter-schoolprogramsimproveacademicperformance,decreaseyouthdelinquencyandotherhigh-risk
Researchrevealsthatqualityafter-schoolprogramsimproveacademicperformance,decreaseyouthdelinquencyandotherhigh-risk
Formilesaround,theneighborhoodswereemptyandsilent.Storesweredark,schoolsclosed,sidewalksempty.Atcorners,thest
IknowwhatyouwilljoinmeinexpressingourdeepcondolencestothepeopleofHaitiandourgratitudetothemanywhoarerus
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselvesinsolutionsinlaboratoryflasks.Thescientists
A_________personisonewhomyoutrust,butwhoharmsyousecretly.
随机试题
工程施工阶段设置道路、组织排水、搭建临时设施、堆放物料和停放机械设备,应当按照()布置。
患儿男,5岁。消瘦,“X”形腿,肋骨呈串珠状,“鸡胸”,头颅略方,体重偏低,X线检查提示:骨质疏松,掌、腕骨愈合缓慢。初步诊断为
患者,男,42岁。平素性急易怒,时有胁胀,近日胁胀加重,伴食欲不振,食后腹胀,便溏,舌苔薄白,脉弦。其证候是()
多数苷类呈左旋,但水解后生成的混合物一般是
下列哪些抗抑郁药与华法林合用需要密切监测凝血酶原时间
竣工决算应包括从()的全部实际支出费用。
1998年3月,梁某伪造了某市供销贸易公司营业执照副本、公章和合同专用章。当月中旬,梁某认识了周某,梁某自称是供销贸易公司业务经理,提出聘周某为公司业务员,周某允诺。3月下旬的一天,梁用伪造公章以供销贸易公司的名义与一乡办衬衫厂签订合同一份,约定衬衫厂供应
美国地方政府发行的市政债券的利率低于联邦政府债券,其原因可能是()。(对外经济贸易大学2013真题)
n个顶点的强连通图的边数至少有
下列给定程序中,函数fun的功能是:求ss所指字符串数组中长度最短的字符串所在的行下标,作为函数值返回,并把其串长放在形参n所指的变量中。ss所指字符串数组中共有M个字符串,且串长小于N。请在程序的下画线处填入正确的内容并将下画线删除,使程序得出
最新回复
(
0
)