首页
登录
职称英语
The crustaceans known as harpacticoids are very widespread in marine sedimen
The crustaceans known as harpacticoids are very widespread in marine sedimen
游客
2025-02-19
9
管理
问题
The crustaceans known as harpacticoids are very widespread in marine sediments, where they feed on microorganisms by ingesting the sediment particles to which the microorganisms adhere. Heavy metals, such as those found in industrial pollution, readily adhere to sediment particles. Harpacticoids are poisoned by heavy metals but are unaffected by most other pollutants. Therefore the concentration of harpacticoids in an area is a good indication of whether that marine environment contains heavy metals.
Which of the following is an assumption on which the argument relies?
选项
A、Industrial pollution is the principal source of heavy metals in marine sediments.
B、Harpacticoids are the only crustaceans that feed on microorganisms by ingesting sediment particles.
C、Harpacticoids are more susceptible to poisoning by heavy metals than are other marine organisms.
D、The microorganisms that harpacticoids feed on are not killed by pollutants that are harmless to harpacticoids.
E、The microorganisms that harpacticoids feed on absorb heavy metals.
答案
D
解析
选项取反。微生物被对猛水蚤无害的污染物杀掉→因为没有微生物可吃,所以有无害污染物的区域依然没有猛水蚤。而原文想得到的结论应该是没有猛水蚤就等于有重金属。但是该选项取反之后,没有猛水蚤还可以表明这个地方没有无害污染物,这使得猛水蚤不能成为可靠的判断重金属的指标,推翻原文,D正确。A项本题和重金属的来源无关。B项选项取反。猛水蚤不是唯一一种通过吃沉积物颗粒来吃微生物的甲壳类动物一猛水蚤依然是以这种方式吃微生物的甲壳类动物,没有推翻原文。C项本题关键不在于对比猛水蚤相比于其他生物对重金属的敏感度。我们只关心猛水蚤本身的敏感度。E项微生物吸收重金属对我们判断文章结论没有帮助。
转载请注明原文地址:https://tihaiku.com/zcyy/3963846.html
相关试题推荐
MarinearchaeologistsrecentlydiscoveredunderwaterinanancientMediterra
Thecrustaceansknownasharpacticoidsareverywidespreadinmarinesedimen
Whatisthewriter’sconclusionconcerningthedeclineofmarineresources?A、The
Timekeeper:InventionofMarine
Timekeeper:InventionofMarine
Timekeeper:InventionofMarine
Timekeeper:InventionofMarine
Timekeeper:InventionofMarine
随机试题
Nowadaysthesponsorshipfeehasbeenanopensecret.Tosendthechildtoa
高中地理《东南亚》主要教学过程及板书设计 教学过程 环节一:导入新课 【教师引导】同学们,你们知道著名新马泰旅游路线包括哪些国家吗?他们大概位于中国的哪个
《药品经营许可证》的有效期为A.5年 B.1年 C.3年 D.2年
《商标法》体现了( )基本原则。A.使用在先 B.申请在先 C.申请单一性
C40混凝土抗压强度试验时的加荷速度取每秒钟MPa。A.0.1-0.3 B.0
固定连接体在基牙近远中面的接触区,其面积不应小于()A.6mm B
具有独特发育周期的微生物是A.支原体B.衣原体C.立克次体D.螺旋体E.放线菌
根据上表,下列说法错误的是:A.2001年至2003年,全国农民人均纯收
下列属于非药品零售连锁企业可以零售的药品的是A.第二类精神药品 B.单味零售的
随着CCl染毒剂量的增高GPT显著增高A.生物效应 B.反应 C.剂量-效应
最新回复
(
0
)