首页
登录
职称英语
There have long been dead zones–water too low in oxygen to sustain most forms of
There have long been dead zones–water too low in oxygen to sustain most forms of
游客
2024-01-10
47
管理
问题
There have long been dead zones–water too low in oxygen to sustain most forms of life—in the Gulf of Mexico, which receives the waters of the Mississippi River. Scientists studied sediment cores from areas where the gulf’s most recent dead zone occurred. The scientists dated the sediment and counted species of foraminifera (marine protozoans) in the sediment; these species thrive in low-oxygen waters. As far back as 1823, the foraminifera thrived especially during Mississippi River flood years (during which nutrients levels increase), suggesting that nutrients in floodwaters can trigger low-oxygen water. The foraminifera in the core samples were most abundant after 1950, when farmers began using some fertilizer, which is rich in nutrients. Researchers believe that increased use of fertilizer leads to more-extreme dead zones. [br] It can be inferred from the passage that the “researchers” would agree with which of the following statements about the use of fertilizer?
选项
A、If farmers near the Mississippi River decreased the amount of fertilizer that they used, the severity of the dead zones could be diminished.
B、If farmers near the Mississippi River continue their dependence upon fertilizers, foraminifera population will eventually decline.
C、If farmers near the Mississippi River stopped using fertilizers altogether, there would no longer be dead zones.
答案
A
解析
文章最后研究者们得到的结论就是肥料的增加会促进死亡区域的产生。因此,肥料的减少也必然会减少死亡区域的产生。A正确。
本文只能看出,继续使用肥料,死亡区域会一直存在,因而foraminifera会一直生长。至于以后foraminifera会不会减少,文中看不出。B不选。
转载请注明原文地址:https://tihaiku.com/zcyy/3350562.html
相关试题推荐
ESCHEW:A、utilizeB、denounceC、endowD、sustainE、searchforE
Witkinsrightlyarguesthatpopulationmaybedeemedavalidsustainabl
SUPPLENESS:LIMBER::A、congruity:fickleB、maintenance:sustainableC、normality
Witkinsrightlyarguesthatpopulationmaybedeemedavalidsustain
Witkinsrightlyarguesthatpopulationmaybedeemedavalidsustain
Witkinsrightlyarguesthatpopulationmaybedeemedavalidsustain
ESCHEW:A、utilizeB、denounceC、endowD、sustainE、searchforE
Therehavelongbeendeadzones–watertoolowinoxygentosustainmostformsof
Therehavelongbeendeadzones–watertoolowinoxygentosustainmostformsof
The(i)________ofmolecularoxygenonEarth-sizedplanetsaroundotherstarsin
随机试题
Afterabusydayofworkandplay,thebodyneedstorest.Sleepisnecessary
WherewasthemeetingtoplanHaiti’srecoveryheld?[br][originaltext]The
某市民政局局长在出差前交代办公室职员小王,在国庆节前下发开展安全生产检查的通知,
患者因反复突然意识丧失、全身对称性抽搐被诊断为癫痫,为确诊最重要的检查是(
李某购买了其亲戚家的一处不动产。按照有关规定,李某应到当地房地产管理部门办理(
下列属于消防安全管理的技术方法有()。A.法律方法 B.事件树分析法 C.
对未来现金流量以恰当的折现率进行折现后的价值,考虑货币时间价值因素的一种计量属性
(2020年真题)甲服装厂为增值税一般纳税人,2019年10月将100
某建设项目发生变动。根据《关于印发〈污染影响类建设项目重大变动清单(试行)〉的通
关于招标投标投诉的说法,正确的有( )A.投诉应当有明确的请求和必要的证明材料
最新回复
(
0
)