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
Acid rain leads to fish mortality. Many species of fish cannot survive in aquatic environments where the pH is below 5.0. If the
Acid rain leads to fish mortality. Many species of fish cannot survive in aquatic environments where the pH is below 5.0. If the
admin
2013-01-28
50
问题
Acid rain leads to fish mortality. Many species of fish cannot survive in aquatic environments where the pH is below 5.0. If the water is too acid, the gill systems of many kinds of fish can be damaged.【21】, the acid alters the blood chemistry of all fish. As a result, the fish population in an acidic environment decreases【22】becomes extinct.
Approximately 20 percent of the lakes in Scandinavia are without fish. Moreover, in Nova Scotia the【23】salmon industry may be threatened by the decrease of salmon in rivers and streams. The impact is also【24】in the waters of Ontario and Quebec, where fish populations are【25】the decline.
What potential remedies exist for the acid rain【26】? The experts disagree. Some say new environmental laws should be【27】to control the emission of pollutants in the atmosphere. Some say that if we had known how serious acid rain was, we would have planned【28】to prevent it.【29】, all agree that if the consumption of fossil fuel were reduced, we would have less of a problem. Another【30】is that special scrubbers could be installed in smokestacks to remove a good【31】of the pollutants before they get into the atmosphere. Other ideas even include breeding more【32】fish. And research suggests that spreading lime into lakes may be effective in【33】acidity. In conclusion, it is clear that if we truly want to reduce the impact of acid rain, a【34】of remedies and international cooperation must be explored. It is a sad fact that acid rain probably could have been avoided if we【35】what we know now.
选项
A、announced
B、ordered
C、imposed
D、enacted
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/x31O777K
0
考博英语
相关试题推荐
Davidlikescountrylifeandhasdecidedto________fanning.
Whyshouldanyonewanttoread_____ofbooksbygreatauthorswhentherealpleasurecomesfromreadingtheoriginals.
Relentlessrainstriggeredheavyfloodinginnineprovinces,where68personswerekilled.Thegovernmentpledgedrelieffundsof
Thereseemsnevertohavebeenacivilizationwithouttoys,butwhenandhowtheydevelopedisunknown.Theyprobablycameabout
Hewritesinavery______manner;there’remanymistakesalmostineverypage.
Duringthenormaldevelopmentofself,achildisaffectedbycertaininfluentialfactors.(1)Infantsformanattachmentwitht
Ourspeciesevolvedonthemove.Recentresearchontheeffectsofexerciseandtheconsequencesofsedentarylivinghasshownt
Theactorshaveto______beforetheyappearinfrontofthestronglightsontelevision.
both本题空格处是说男人和女人都要去森林处的耕地去播种玉米。both…and…意为“不但……而且……;既……又……”。
Certainlynocreatureintheseaisodderthanthecommonseacucumber.Alllivingcreatures,especiallyhumanbeings,havethei
随机试题
抑郁症的自杀率为()
企业防御战略类型包括( )
其清除率可用来代表肾小球滤过率的物质是
女性,28岁。因“抽搐、意识不清、高热3天”入院。病程中抽搐表现为双上肢弯曲,双下肢伸直,神志不清,伴有瞳孔扩大,舌咬伤及尿失禁。每次持续5~10min不等,发作间歇期意识不恢复,处于昏迷状态。同时伴有高热,体温达38.2℃~39.7℃。既往有头部外伤史。
屋面均布荷载设计值(包括檩条自重)q=1.5kN/m2。试问,多跨(≥五跨)连续檩条支座最大弯矩设计值(kN·m)与下列( )项数值最为接近。提示:可按M=0.105ql2计算。60m跨度托架端斜杆1的轴心拉力设计值(kN)与下列( )项数
马克思主义中国化的理论成果包括()
材料一《义务教育生物学课程标准(2011版)》对“开花和结果”部分内容标准如下:材料二某教材的相关内容如下:想一想,议一议许多植物的花色彩鲜艳,气味芬芳,让行人禁不住驻足观赏,甚至要凑上去闻一闻那沁人心脾的花香。
IseeabrokenuplandinthefarNorthwest.Itsgrayandpurplerocksareinterpatchedwithcolorsrichandwarm,thenew-bornc
ThenumberofwomendirectorsappointedtocorporateboardsintheUnitedStateshasincreaseddramatically,buttheratiooffe
SharingEconomicLossesThroughInsuranceEachminuteofthedayornight,everyonefacesapossiblefinancialloss.Ahome
最新回复
(
0
)