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
Let us consider what science and technology have to contribute to the food problem. The simplest way to increase food produ
Let us consider what science and technology have to contribute to the food problem. The simplest way to increase food produ
admin
2010-02-17
53
问题
Let us consider what science and technology have to contribute to the food problem.
The simplest way to increase food production, one might suppose, is to bring more land 【C1】______ cultivation and put more people to work on it. Some of the underdeveloped countries have resorted to this 【C2】______ approach, without notable success. It contains several fallacies. For one thing, it usually means 【C3】______ into marginal lands where the soil and climatic conditions give a poor 【C4】______ . Cultivation may quickly deplete this soil,【C5】______ it for pasture or forest growth. It is often possible, of course, to turn such lands into useful farms by agricultural 【C6】______ ; for instance, a sophisticated knowledge of how to use the available water【C7】______ an irrigation system may reclaim semi-arid grasslands for crop-growing. But the cultivation of marginal lands i6 in any case unsuccessful【C8】______ it is carried out by farmers with a centuries - old tradition of experience or by modern ex pelts with a detailed knowledge of the【C9】______ conditions and the varieties of crops that are suitable for those conditions. Such knowledge is【C10】______ absent in the underdeveloped countries.
【C11】______ , we know that highly developed countries have not increased the【C12】______ of acres under cultivation, 【C13】______ on the contrary have 【C14】______ their marginal lands and steadily reduced the proportion of the population engaged in farming. Efficient farming【C15】______ concentration on the most efficient lands, and it results in greater production with【C16】______ people. The problem of the underdeveloped countries, then is to increase the【C17】______ of their farms and farmers. This would allow them to industrialize and to feed their people more adequately. It is not easy to【C18】______ , how ever. The farmers are conservative and resistant to change【C19】______ their methods of cultivation. The underdeveloped countries are greatly in need of studies and experiments to help them to【C20】______ modern agricultural methods to their own conditions.
【C7】
选项
A、from
B、beyond
C、through
D、over
答案
C
解析
此题考查介词的使用。从题干中可看出这一介词短语应作方式状语,因此C项through“通过……”符合题意。
转载请注明原文地址:https://kaotiyun.com/show/QknK777K
0
专业英语四级
相关试题推荐
PASSAGETHREEWhatnotiondidPicassoacceptwhenproducingseveralguitarversions(Para.5)?
(1)Likemanyhistoricalfilms,Amadeusisfarfromafaithfulaccountofwhatisknownabouttheperiodandthepeoplethat
GreatDepressionI.ThedefinitionofgreatdepressionA.definition:a【T1】________depressionB.place:America,triggeredb
EthicsinCompaniesI.TheimportanceofethicsA.【T1】______enablescompaniestoexploittheeconomicadvantages,whereas【T2】_
PassageThree(1)Givenallthathashappenedonsomanycampusesoverthelastfewyears,it’shardtopicktheonethath
Dogsreallyareourbestfriends,accordingtoaSwedishstudythatsayscanineownershipcouldreduceheartdisease.Astudyo
Ifyouputwateronthestoveandheatitup,itwillatfirstjustgethotterandhotter.Youmaythenconcludethatheatingw
ThePrimeMinisterandTradeUnionagreedto______.
Wheredidthecustomergetthesweater?
EnglandandFranceareseparatedby22milesofopenoceanattheirclosestpoint.AttemptstoswimtheEnglishChannelhavebee
随机试题
期货公司从事金融期货结算业务,应当经()批准。
Pickouttheappropriateexpressionsfromtheeightchoicesbelowandcompletethefollowingdialogsbyblackeningthecorrespon
羚羊角除了具有清肝明目的功效外,还能
防止仓虫入侵的最基本和最有效的养护方法是()。
A、≥10μg/mlB、>12μg/mlC、>20μg/mlD、≥100μg/mlE、>200μg/ml苯妥英钠致死血浓度为
普惠型小微企业主贷款是银行业金融机构向个体工商户发放的、用于从事生产经营活动、单户授信总额3000万元(含)以下的贷款。
根据《民法通则》的规定,从权利被侵害之日起超过()年的,人民法院不予保护。
AstudyfoundthattheradiationfromCTscans—thetestsregularlyusedto【C1】______internalinjuriesorsignsofcancer—islike
试给出部门、等级、项目、工作计划关系模式的主键和外键,以及基本函数依赖集F1、F2、F3和F4。假定月工作业绩关系模式为:月工作业绩(职员代码、年月、工作日期),请给出“查询职员代码、职员名、年月、月工资”的SQL语句。
有以下程序#include<iostream.h>voidmain(){inta=5,b=0,c=0;if(a=b+c)cout<<"***"<<endl:elsecou
最新回复
(
0
)