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
In my neighborhood in the early 1980s, we spent the summer playing kickball. Our front lawns were a constant. We took their soft
In my neighborhood in the early 1980s, we spent the summer playing kickball. Our front lawns were a constant. We took their soft
admin
2013-08-03
80
问题
In my neighborhood in the early 1980s, we spent the summer playing kickball. Our front lawns were a constant. We took their soft, grassy goodness for granted, until the lawn service arrived. Now and then, a tanker truck pulled up, and two men in coveralls sprayed who knows what all over our grass. Before they left, they put up little flags reminding us to keep off the lawn for 24 hours. For emphasis—or the pre-literate—the signs featured a skull and crossbones. In part because of those tanker trucks, grass has taken a major public relations hit. Its constant need for fertilizer and herbicides is supposed to make it an environmental disaster.
Grass is now the biggest crop in the Chesaeake Bay area, and will soon surpass all crops combined. Excess chemicals placed on lawns at the wrong time or carelessly scattered on impermeable surfaces can end up in the fragile bay. Excess fertilizer, to take just one example, contributes to eutrophication, which occurs when too many phosphates and nitrates build up in a body of water, feeding an explosion of algae. When the algae decompose in the bay, they use up much of the available oxygen, choking off crabs and other marine life.
So is it possible to be environmentally sensitive and have a good lawn? Yes, according to Frank Rossi, an associate professor of horticulture at Cornell University. It’s simple, he says. Once your grass gets going, here comes the really hard part if you’re trying to maintain a healthy lawn without chemical intervention: Leave it alone.
You read that right. According to Rossi, the biggest mistake people make is failing to control their impulse to intervene. They mow too short and too often. They water too much. They fertilize too frequently. And, when things go bad, they break out massive amounts of chemicals to try to control the advancing weeds.
You should mow your grass to a height of three inches. And don’t mow it again for 10 days. Two weeks if you can stand it. As for fertilizer, do it twice a year, at most. But don’t even think about doing it in the early spring. As for watering, do it only once or twice a week. If mushrooms develop, you’re watering way too much—and wasting water. It’s better to give your lawn a good weekly soaking than to water a little every day.
One last tip: You don’t need perfectly uniform grass all the time. " This is a lot easier if you don’t try to make your lawn look like the center field at Nationals Stadium," cautions Rossi. In other words, if you can roll a kickball on it, you can be content.
What is eutrophication?
选项
A、A process of destroying water ecosystem.
B、A result caused by algae decomposition.
C、A phenomenon occurred with fertilizer use.
D、A place full of chemicals and algae.
答案
A
解析
细节题。根据关键词eutrophication定位至第二段第三句。根据关键词之后的解释说明,磷酸盐和硝酸盐过度激增时,就会引起藻类的大爆发,之后藻类的分解则会用尽水体中的氧气,导致水生生物窒息而死,因此这是一种破坏水体生态体系的过程,[A]为答案。根据上下文内容,特别是定语从句中与动词occur的搭配关系,可知该词不是指一个地方,易排除[D];关键词的出现首先还是化学物质排入水体造成的,故[B]概括不全面,也应排除;[C]项“一种使用化肥时出现的现象”将原词出现的范围扩大了,只有在过量施肥才会出现这种现象,故[C]的说法也不准确。.
转载请注明原文地址:https://kaotiyun.com/show/zLLK777K
0
专业英语四级
相关试题推荐
Althoughthecompanystillhassomedifficulties,thedirector’sreportendedonanoptimistic
It’snotfairthatyoucomehomeafterabaddayatworkand______yourwifeandchildren.
Acommonassumptionabouttheprivatesectorofeducationisthatitcatersonlytotheelite.【C1】______recentresearchpoints
MostChinesepeoplewenttoworkbybikewithinliving_____.
HealthMinisterNicolaRoxon’slatestproposalthatpatientsbeallocatedtodoctorsonalistbasisisstraightoutoftheplay
CanadawillcallbackitsambassadorbecausetheTeherancourt
CanadawillcallbackitsambassadorbecausetheTeherancourt
Thebankmanageraskedhisassistantifitwaspossibleforhimto______theinvestmentplanwithinaweek.
Perhapsthemythoftheperfectcommunicatorcomesfrombelievingtoostronglyinnovels,television,orfilms.Intheseplaces
ItispossibleforstudentstoobtainadvanceddegreeinEnglishwhileknowinglittleornothingabouttraditionalscholarlymet
随机试题
传统的西方法律思想史研究存在“吃偏食”的现象,即研究的范围、题材的主次、对象的脉络等受制于英语学术谱系,这种单一的考察重心限制了研究者的视角。而实际上,在非英语学术谱系中存在大量有价值的材料。这要求研究者把目光投向先前不够重视的领域。比如“一带一路”建设参
Foreignersoftenfailtoappreciatetheformalcodeof【B1】______inFrance.TheFrenchshakehandswitheveryone(family,childre
26岁,女性,停经45天,突感下腹坠痛及肛门坠胀感,少量阴道流血及头晕呕吐半天。体格检查:面色苍白,BP80/40mmHg,腹肌略紧张,下腹压痛。妇科检查:阴道少量血性物,宫颈举痛(+),后穹隆饱满,子宫稍大,附件区触诊不满意。本例最可能的诊
《中华人民共和国民法通则》第6条规定:“民事活动必须遵守法律,法律没有规定的,应当遵守国家政策。”从法官裁判的角度看,下列哪一说法符合条文规定的内容?(2012年卷一第10题)
施工风险管理中,风险评估的工作有()。
计算机的移动硬件设备包括()。
根据所给资料,回答下列问题。2014年,全国粮食播种面积112738.3千公顷,比2013年增加782.7千公顷。其中谷物播种面积94622.8千公顷,比2013年增加854.1千公顷,增长0.9%。全国粮食总产量60709.9万吨,比
一、注意事项1.申论考试是对考生阅读理解能力、综合分析能力、提出和解决问题能力以及文字表达能力的测试。2.作答参考时限:阅读资料40分钟,作答110分钟。3.仔细阅读给定的资料,按照后面提出的“申论要求”依次作答。二、给定资料
Earthquakesurvivorstrappedinrubblecouldonedaybesavedbyanunlikelyrescuer:Aroboticcaterpillarthatburrowsitsway
Themovementofthesuncreatesperiodsof________.
最新回复
(
0
)