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
2012-08-05
53
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。
转载请注明原文地址:https://jikaoti.com/ti/hMgMFFFM
0
专业英语四级
相关试题推荐
Ifyou’reworriedaboutyourweight,healthyeatingandexercisingmayhelpeaseyourworries.Tobeginwith,beingmoreactive
TheMetropolitanPolicewillnolongerdescribeblackpeopleasblack,aspartofanewattempttocounterchargesofracismin
Theystayeduplatetryingto______outawaytosolvetheproblem.
Whydoadultsbelievethatalcoholicawarenessprogramsteachyoungpeoplenottoover-drink?Recently,readinganarticleabout
Theprofitableofficesunderthegovernmentwerefilledbymenwhohadcontractedluxurioushabitsoflivingwhichtheywouldno
Whatistheman’spurposefortalkingwiththewoman?
Whatkindofwhiskydoesthemanexpecttobeoffered?
Theauthorityclaimsthatthenewpillscandramaticallyincreaselifeexpectancy,butthere’sno______evidencetosupportthi
EversincehumanbeingshaveinhabitedtheEarth,earthquakeshaveplaguedourlives.ThesedangerousactsoftheEarthhave【C1】
Oneofthequestionsthatiscomingintofocusaswefacegrowingscarcityofresourcesofmanykindsintheworldishowtodiv
随机试题
下列只能读不能写的文件打开方式是()。
女性,40岁,因右侧甲状腺单发肿物,颈部淋巴结无肿大,施行甲状腺肿物摘除术,病理报告为甲状腺乳头状腺癌,术后5天拆线。拆线后还应对病人作如下哪种处理
[背景资料]某办公楼工程,地下一层,地上十层。现浇钢筋混凝土框架结构,基础为管桩基础。建设单位与施工总承包单位签订了施工总承包合同,合同工期为29个月。按合同约定,施工总承包单位将预应力管桩工程分包给了符合资质要求的专业分包单位。施工总承包单位提交的施
付款人只是基于出票人的付款委托使其具有承兑人的地位,在其对汇票进行承兑后,即成为汇票上的主债权人。()
贷款人应当建立和完善贷款的质量监管制度,对不良贷款进行()
以下()不是社会工作价值的含义。
维果斯基认为,确定适当的目标就能更好地促进学生发展,这个适当的目标用一个比喻就是跳起来能摘到桃子。()
百姓有所呼,政府有所应。长春市人民政府举办局长接待日活动多年来持之以恒,形成制度,深受百姓欢迎。政府各部门“一把手”亲自出面,倾听群众意见和诉求,对个案问题、共性问题和政治层面问题,抓住关键和症结所在,落实政策:对新情况、新问题,有针对性地深入研究探讨,完
甲通过铁路部门的货运将一包裹运送至北京,甲与铁路部门形成的货运合同法律关系的客体是()
Thereissomething______aboutherearlychildhood;nobodyknowsanythingaboutit.
最新回复
(
0
)