首页
登录
职称英语
A wetland is an area where the soil is typically water-logged. Plants and an
A wetland is an area where the soil is typically water-logged. Plants and an
游客
2024-01-07
36
管理
问题
A wetland is an area where the soil is typically water-logged. Plants and animals living there depend on the we ness for their (21) Draining swamps is a widespread occurrence which kills off wildlife and, consequently, wetlands are (22) worldwide. It is a feature of wetlands that conditions vary according to (23) Water-tolerant plants grow both in and out of the water and water levels are usually (24) Wetlands naturally occur between land and water and become (25) for various wildlife during very dry periods. They also act as nurseries for different kinds of animal life. Wetlands are known to upgrade (26) by removing pollutants.
A.water quality
B.seasonal change
C.saturated soil
D.safe places
E.quite low
F.quite high
G.nutrients
H.nurseries
I.international recognition
J.farming activity
K.extinct
L.continued existence
M.commercial development
N.at risk [br]
PERRY: Hi, Opal. Any ideas about what we should do for our geography project?
OPAL: Hi, Perry. Yes, I’d like to do something on Wetlands.
PERRY: I think that’s a great idea—where do we start?
OPAL: With a definition of course—something like: ’ a marshy area of land where the soil near the surface is saturated or covered with water, forming a special habitat for wildlife’.
PERRY: And we could add: ’the flora and fauna of the area are reliant on the water-logged soil for their survival’.
OPAL: Yes, that’s a major problem actually—when commercial developers or farmers come along and decide to drain the swamps—everything dies. The practice is all too common unfortunately. Did you know that, as a result, wetlands are recognized internationally as one of the most threatened types of habitat?
PERRY: That’s right. We’ll have to be sure to discuss their importance in our assignment.
OPAL: But, first, I think we should state some of the particular characteristics of wetlands.
PERRY: Well, there are three that I can think of. To start with: wetlands are limited areas of open water, which vary depending on seasonal fluctuations.
OPAL: Yes...and the second could be that there’s usually a variety of water-tolerant flora on the banks and throughout the water.
PERRY: Of course, depending on the time of year, there may be more or less water but levels generally remain quite shallow.
OPAL: Okay...now let’s move on to the importance of wetlands.
PERRY: Shall we start with plant and wildlife habitat?
OPAL: Yes, I think we should point out that wetlands are homes for countless species of water birds, frogs, invertebrates and fish...
PERRY: ...and they support many varieties of water-loving plants...
OPAL: which brings us naturally to the topic of biodiversity—even small wetlands act as borders between land and permanent water. They turn into refuge areas or sanctuaries in times of drought and they often support rare and threatened plants and animals found nowhere else.
PERRY: Exactly. And they’re especially important as nurseries and breeding grounds for all kinds of fish, birds and invertebrates.
OPAL: Wetlands are important for improving the purity of the water, too.
PERRY: Yes, that’s because the flow of water through the wetlands is slowed by bank and in-stream plants, and so it allows sediment to settle. Nutrients, such as nitrogen and phosphorous and other pollutants are removed as the water passes through.
选项
答案
E
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3340708.html
相关试题推荐
Awetlandisanareawherethesoilistypicallywater-logged.Plantsandan
Awetlandisanareawherethesoilistypicallywater-logged.Plantsandan
Awetlandisanareawherethesoilistypicallywater-logged.Plantsandan
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalst
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalst
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalst
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalst
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalst
ENDANGEREDSPECIESAlthoughwecannotdoanythingabouttheplantsandanimalst
SavingthejuniperplantBackgroundJuniperwasoneofthefirstplantstocolon
随机试题
[audioFiles]audio_eusm_j01_036(20099)[/audioFiles]A、Theyshouldwaitpatiently.
中国民族自古以来从不把人看作高于一切,在哲学文艺方面的表现都反映出人在自然界中与万物占着一个比例较为恰当的地位,而非绝对统治万物的主宰。因此我们的苦闷,
传染病能在人与人.动物与动物或者人与动物之间相互传播,具有流行性和_______
假定学生Students和教师Teachers关系模式如下所示: Studen
国家食品药品监督管理局负责对药品的A研究、生产、使用进行行政监督和技术监督 B
其他人员应在()等待,不得进入主控室及设备场区。检修区$;$非设备区
A. B. C. D.
传统中国的日常生活世界总是曲里拐弯,充满细节、血肉,剪不断,理还乱。在是否宜居方
A公司只生产销售B产品,其销售量预测相关资料如下表所示: 要求:
属于机坪供电对象的是( )。A.顺闪灯光系统 B.调光器 C.泊位
最新回复
(
0
)