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
DDT, the most powerful pesticide the world had ever known, exposed nature’s vulnerability. Unlike most pesticides, which effecti
DDT, the most powerful pesticide the world had ever known, exposed nature’s vulnerability. Unlike most pesticides, which effecti
admin
2012-10-19
38
问题
DDT, the most powerful pesticide the world had ever known, exposed
nature’s vulnerability. Unlike most pesticides, which effectiveness is limited (1)______
to destroy one or two types of insects, DDT was capable of killing hun- (2)______
dreds of different kinds at once. Developed in 1939, it first distinguished
itself during World War II, cleaning South Pacific islands of malaria- (3)______
caused insects for U.S. troops, while in Europe being used as an effective (4)______
de-lousing powder. Its inventor was awarded by the Nobel Prize. (5)______
When DDT became available for civilian use in 1945, there were only
a few people who expressed the second thoughts about this new miracle (6)______
compound. One was nature writer Edwin Way Teale, who warned, "A spray
as discriminate as DDT can upset the economy of nature as much as a revo- (7)______
lution upsets social economy. Ninety percent of all insects are good, but if (8)______
they are killed, things go out of kilter right away." Another was Rachel Car
son, who wrote to the Reader’s Digest to propose an article about series of (9)______
tests on DDT being conducted not far from which she lived in Maryland. (10)______
The magazine rejected the idea.
(4)
选项
答案
caused — causing
解析
动词的-ed分词和-ing分词作名词修饰语时,-ed分词表示的是动词和所修饰名词间的被动关系,而-ing形式表示的则是主动关系,此句中malaria-causing insects相当于in-sects that caused malaria,因此是主动关系,所以应选择一ing形式。详细说明请参照本书第37页关于动词的-ed分词和-ing分词区别的解释。
转载请注明原文地址:https://www.kaotiyun.com/show/esaO777K
0
专业英语八级
相关试题推荐
Thehumangeneticsequencewillallowresearcherstomakerapidprogressinunderstandingtherelationshipbetweengenesandbeh
DavidLandes,authorofTheWealthandPovertyofNations:WhySomeAreSoRichandSomeSoPoor,creditstheworld’seconomica
TheDoubleNatureofLiteraryTranslationⅠ.IntroductionNewtendency:combinationoftwotheoriesⅡ.Translationi
AfterWorldWarII,whenalargecollectionofImpressionistpaintingswasmovedtotheCalrieNationaleduJeudePaumeinPar
Ourconstitutiondoesnotcopythelawsofneighboringstates;weareratherapatterntoothersthanimitatorsourselves.Itsa
ChrisGardner’sunlikelyroadtorichesstartedintheparkinglotofSanFranciscoGeneralHospitalin1982.Thenage29andth
Theshortstoriesoftenwithsurpriseendingssuchas"TheGiftofMagi"and"TheLastLeaf”arewrittenby______.
Theneedforasatisfactoryeducationismoreimportantthaneverbefore.Nowadays,withoutaqualificationfromareputablesch
The18acenturywitnessedanewliteraryform-themodemEnglishnovel,whichcontrarytothemedievalromance,givesa______pre
BodySystemsAbodysystemreferstoagroupoforgans,whicharepartsofthebodythatdoaspecialjob,suchastheheart,
随机试题
A.中极B.关元C.气海D.天枢常用以诊断小肠病的腧穴是
男性,40岁,4年来活动时心悸、气短,2个月来有夜间憋醒。查体:血压130/80mmHg,颈静脉无怒张,心界向左扩大,心尖部可闻及舒张期隆隆样杂音。心率80次/分,双肺底未闻及干湿性啰音,肝、脾肋下未及,双下肢无水肿。既往:20年前发热、下肢关节红肿史。
围生期是指
机体的抗感染免疫主要包括以下哪两大类
(特殊人群合理应用抗菌药物)A.透析患者B.肺结核患者C.8岁以下儿童D.肝功能减退患者E.细菌性感染的老年人避免使用利福平、红霉素酯化物等的是
当有()情况之一的,不得按照全国统一测强曲线进行换算,但可制订专用测强曲线或通过试验修正。
普通吊架由()组成。
下列关于肺癌的描述,正确的是()。
设函数f(x)在[一2,2]上二阶可导,且|f(x)|≤1,又f2(0)+[f’(0)]2=4.试证:在(一2,2)内至少存在一点ξ,使得f(ξ)+f”(ξ)=0.
ChineseNewYearisChinasmostimportanttraditionalfestival,withmanyinterestingcustoms.ItisneveronJanuary1.Chinese
最新回复
(
0
)