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
2010-11-02
55
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. (32)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.
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://kaotiyun.com/show/uNs7777K
0
大学英语六级
相关试题推荐
A、In1774.B、In1765.C、Intheseventeenthcentury.D、Inthenineteenthcentury.A选项和时间有关,本题是时间题。从Wattwasrepairingoneofthes
Noeventhashadsucha【B1】______effectinshapingtheattitudeoftheIrishpeopletowardstheBritishastheIrishFamine.Lo
A、Takingpicturesunderwater.B、Connectingpipelines.C、Plantingseaweeds.D、Placingexplosivesunderthewater.C
TheSeattleTimesCompanyisonenewspaperfirmthathasrecognizedtheneedforchangeanddonesomethingaboutit.Inthenews
Francemightbedescribedasan’all-round’country,onethathasachievedresultsofequalimportanceinmanydiversebranches
A、Hercarisbeingrepaired.B、Parkingisdifficultinthecity.C、Thecostoffuelhasincreased.D、Shewantstohelpreducepo
A、Comedy.B、Lightmovie.C、Mysterymovie.D、Actionmovie.C综合推断题。女士和男士在对话结尾处一部悬疑电影都给出了很高的评价,因此男士在最后说,至少他们的某些观点是一致的,他觉得他们以后得去看悬疑电
PreparingforWeightLossSurgeryForthosewhoconsiderweightlosssurgery,theyareattheendoftheirropes.Traditiona
A、Becausetheyawardedthosecriminalsforbehavingthemselvesinprison.B、Becausetheythoughtcriminalsalsohadtherightto
A、Friendlyandwillingtosharefriends.B、Superficiallyfriendlyandopen.C、Friendlyandrelaxing.D、Ofteninvitingyoutothe
随机试题
下列方法中适用于各种产品机械化程度相近的车间或部门的制造费用分配的是【】
T1值定义为
下列部位的口腔黏膜上皮有角化,除了
女性,35岁,昏迷1小时。患者1小时前因与家人不和,自服药水1小瓶,把药瓶打碎扔掉,家人发现后5分钟病人出现腹痛、恶心,并呕吐一次,吐出物有大蒜味,逐渐神志不清,急送来诊。患者自病后大小便失禁,出汗多。既往体健,无肝、肾、糖尿病史,无药物过敏史,月经史、个
根据行政强制法律制度的规定,下列行政行为不属于行政强制措施的是()。
建构主义在一定程度上对知识的客观性和确定性提出了质疑,强调知识的动态性。()
阅读以下文字。回答下列问题。板块结构理论认为,地球的外壳分为若干部分或称为板块,这些板块始终处于相对运动之中。板块的不断移动,使断层——穿过岩层的地质裂缝——的应力不断增加,造成岩层的略微变形,最终断裂而产生断层地震。这时变形的岩层会弹回来,像一根拉长的
简述高级心理机能及其产生。
下列学校中不属于新教育运动的实验的是
电子商务应用系统由4部分构成,它们是CA安全认证系统、业务应用系统、用户及终端系统和
最新回复
(
0
)