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
A、Grassland for animals. B、A land covered with trees. C、A steep slope of a hill. D、A land with fertile soil. C短文开头提到边缘性土地土质差,一般位
A、Grassland for animals. B、A land covered with trees. C、A steep slope of a hill. D、A land with fertile soil. C短文开头提到边缘性土地土质差,一般位
admin
2011-01-01
47
问题
(30) "Marginal" lands might have low quality soil. Or they might be on a hillside that rises sharply. Or they might be in an area that gets limited rainfall. In any case, they are the last to be planted under good conditions and the first to be abandoned under bad conditions.:
But there are uses for marginal lands. Most often they are used as grasslands for cattle, sheep or goats. A farmer might use native grasses or non native seeds. Either way, it is important to establish good ground cover to avoid the loss of soil through erosion. But using marginal land for grazing is not as simple as it might sound. Cattle can damage forage(草料) crops by eating down to the roots. Their weight also crushes the soil. That can make the ground too hard for growing. (31) A way to reduce the damage from overgrazing is to move animals from one field to another. Experts say rotational grazing like this is extremely important for marginal land.
Another use for marginal land is for tree crops. Trees help support the soil. They reduce the damaging effects of wind and rain. And they can provide grazing animals with shade from the sun. Studies have shown that white pines grow well on marginal land. They grow fast and provide good quality wood. There are slower-growing trees like the black walnut that provide a nut crop as well as wood. Marginal lands need care. Failing to take care of them might only make a bad situation worse. But good planning can turn a marginal resource into a highly productive one.
Questions:30. Which of the following is a marginal land?
31.According to the speaker, how to reduce the damage on marginal lands from overgrazing?
32.Which of the following is NOT the advantage of planting trees on marginal land?
选项
A、Grassland for animals.
B、A land covered with trees.
C、A steep slope of a hill.
D、A land with fertile soil.
答案
C
解析
短文开头提到边缘性土地土质差,一般位于陡坡处或雨水稀缺处,故选C)项。
转载请注明原文地址:https://jikaoti.com/ti/FtlFFFFM
0
大学英语四级
相关试题推荐
Sonowyoumaybeaskingwhatisthedifferencebetweengreenteaandtheblackteayouareusedtodrinking.Bothteascomefro
Sonowyoumaybeaskingwhatisthedifferencebetweengreenteaandtheblackteayouareusedtodrinking.Bothteascomefro
A、Noreasoncanexplainwhysomepeopleareleft-handed.B、Differenceingenderandnationalityistheconcernedfactor.C、Thec
A、Theyarefewinnumber.B、Theyprovidealotofinformationaboutordinarypeople.C、Theydepictimportanthistoricalevents.
A、Peopleenjoysport.B、Therearegeneralprinciplesgoverningsport.C、Sportmakeswarlesslikely.D、Sportisenjoyedbycommo
A、Becausethetwomenstolehismoney.B、Becausethetwomenthreatenedhimonalonelycountryroad.C、Becausehesuspectedthe
A、Itwasmadeofaluminum.B、Itwasn’tlargeenough.C、Itwouldn’tmoveinthewind.D、Itwastooheavytoputup.D
Peopleappeartobeborntocompute.Thenumericalskillsofchildrendevelopsoearlyandsoinexorably(坚定地)thatitiseasy
A、Tomakeanappointment.B、Toattendaparty.C、Togotowork.D、Tolookafterthechildren.A信息明示题。对话中明确指出女士请求男士帮忙照顾孩子,因为她十一点要
A、Whentheyareonholidays.B、OnSundaymornings.C、OnSaturdaynight.D、Assoonastheyhaveinformation.B最后一段指出想要租房子的人们通常会在
随机试题
下列对放射最敏感的细胞是
经台盼兰染色后,活细胞呈
显示肺尖部病变的最佳体位是
治疗地高辛中毒引起的快速性心律失常的药物是治疗地高辛中毒引起的窦性心动过缓和传导阻滞的药物是
土基填土厚度要合适,采用一般能量机械压实时,每层的最大松铺厚度不应超过()。
若{an}为等比数列,且a2、a7为方程x2—12x+8=0的两根,a3a6+=________.
试述加涅关于学习结果的划分与新课改三维目标的关系。
《春江花月夜》在唐诗史上地位突出,被闻一多先生誉为“以孤篇压倒全唐”。其作者是——。
设矩阵A=试判断A和B是否相似,若相似,求出可逆矩阵X,使得X-1AX=B.
A.abruptlyB.bluntlyC.consumeD.courseE.efficientF.laneG.preludeH.propertyI.scribbled
最新回复
(
0
)