首页
登录
职称英语
Early naturalists believed two species of beaver lived in North America: dam
Early naturalists believed two species of beaver lived in North America: dam
游客
2024-01-10
4
管理
问题
Early naturalists believed two species of beaver lived in North America: dam beavers and bank beavers. The bank species was thought to resemble the muskrat in behavior, living in burrows or lodges and unable to build dams. In fact, dams are primarily a strategy for dealing with annual variations in water levels. If water levels fall in summer, as they do in most of North America, then beavers lodge entrances may be exposed. With stabilized water levels, their homes are much safer. Along deep rivers, where bank beavers are found, this problem seldom arises. But these beavers do know how to build dams, and do so if the need arises, as may occur if they are forced to relocate after felling and consuming all nearby trees. [br] The passage provides support for which of the following statements about beaver dams?
选项
A、One important function of these dams is to protect beavers homes.
B、Most are built prior to burrow construction.
C、They are found mostly along deep rivers.
D、They are routinely abandoned as nearby forests are depleted.
E、They mainly protect beavers from rising water levels.
答案
A
解析
根据三四五可知,水坝的作用是保护海狸的家,选项A正确。B项文中看不出水坝和洞穴的时间顺序。C项根据第三句,如果沿着深河,那么就不需要水坝。D项根据第四句,森林耗尽之后反而需要水坝。E项根据第五句,水位下降的时候才需要水坝。
转载请注明原文地址:https://tihaiku.com/zcyy/3349537.html
相关试题推荐
Paradoxically,England’scolonizationofNorthAmericawas______byitssuccess
ForthosePuritanswhobelievedthat(i)____obligationswereimposedbydivine
SuspiciousoftoopowerfulaPresident,Americansnonethelessare____whenaPr
Thevaledictoryaddress,asithasdevelopedinAmericancollegesanduniversiti
Before1500NorthAmericawasinhabitedbymorethan300culturalgroups,eachw
LinguistshavenowconfirmedwhatexperiencedusersofASL-AmericanSignLanguag
InmostNativeAmericancultures,anarticleusedinprayerorritualismadewi
Reasonwasoncebelievedtobe(i)______human,butlatelythisassumptionofin
Mostplantspeciesexhibit(i)______intheirgeographicaldistribution:often,
Ifaspeciesofparasiteistosurvive,thehostorganismsmustlivelongenough
随机试题
【B1】[br]【B2】[originaltext]Thelackofpersistenceisthereasonmostpeop
下列画横线的句子翻译错误的一项是( )
设确定了函数y=g(x),则( )。A.x=0是函数y=g(x)的驻点,且是极
读城市中心与郊区垂直(H)方向上的气压(P)分布图。完成题。 根
我们通常所说的道·琼斯指数是指()。A.道·琼斯工业股价平均数 B.NASD
人类最初的造血中心是A.血岛B.骨髓C.胸腺D.淋巴结E.肝脏
Thechangeinthatvillagewasmiraculou
公共设施开发的过程包括( )。A.项目设想阶段 B.项目投融资阶段 C.可
甲、乙、丙拟设立A有限责任公司(以下简称“A公司”),甲在办理A公司设立事务途中
地下燃气管道不得穿越( )。A.热电厂 B.雨水口 C.街心花园 D.汽车
最新回复
(
0
)