首页
登录
职称英语
What are pollinators? [br] [originaltext]Rowers are known to employ all manner
What are pollinators? [br] [originaltext]Rowers are known to employ all manner
游客
2025-01-17
8
管理
问题
What are pollinators? [br]
Rowers are known to employ all manner of trickery to attract pollinators, from taking the shape of an insect mate to emitting wafts of rotting flesh. A South African flower lures in its main pollinators, Desmometopa flies, with the scent of a fresh meal. The flower produces a cocktail of chemicals that mimics those released by a wounded honey bee, drawing flies into a pollen-coated chamber.
At the moment, most contaminated wells are found through a time-consuming, labor-intensive process of going village to village and testing each well with a chemical-reaction field kit. After the water is mixed with several reagents, a testing strip is inserted into a sealed container to absorb any arsenic released. The color of the strip after about 10 minutes gives a ballpark result; white indicates the water is clean; red shows it is tainted.
选项
A、How to test the water in contaminated wells.
B、How serious is the problem of tainted water.
C、How tedious is the testing work.
D、How to differentiate the clean water from the poisonous.
答案
A
解析
文章首句是主题句,接着向我们介绍检验的步骤。
转载请注明原文地址:https://tihaiku.com/zcyy/3916370.html
相关试题推荐
Historyisfullofjobsthattookanimmensephysicaltollonemployees,fro
Therearemorepeoplewhoareobesetodaythan20yearsago.A、gainfullyemployed
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
OfalltheemployedworkersintheUnitedStates,12.5millionarepartofa
随机试题
Thefridgeisconsideredanecessity.Ithasbeensosincethe1960swhenpa
In1972,acenturyafterthefirstnationalparkintheUnitedStateswasestabl
Gallopingtechnologicalprogresshasmadeconsumers______:advancesundreamedof
TheUniversityBookstoreisaserf-supportinguniversity-ownedorganization,
[originaltext]Scientiststhinkitwillbepossibletorecordpeople’sdream
SocialMediaandMarketingA)InMay2013,Ritz-CarltonH
There’snothingliketheinstinctiveroarofthecrowdwhenthousandsofpeo
食管癌造影片上,可见食管不规则狭窄,黏膜破坏、中断,管壁僵硬。
A.芒硝B.朱砂C.雄黄D.硇砂E.珍珠主要成分为硫酸钠的药物是
求助者对心理咨询产生依赖的可能原因包括()。 (A)求助者不理解心理咨询的实
最新回复
(
0
)