sea otters have very little fat.in order to adapt to the col

梦里是好银2022-10-04 11:39:541条回答

sea otters have very little fat.in order to adapt to the cold water temperature during the winter period,they have very dense furred skin,which acts as great insulator.4546

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jackylla 共回答了11个问题 | 采纳率100%
海獭有很少的脂肪.为抵御冬季寒冷的水温,他们皮肤上长着稠密的软毛,而这种软毛又具有很强的保暖作用.
1年前

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by consuming large numbers of sea urchins,sea otters act as
by consuming large numbers of sea urchins,sea otters act as a keystone species structuring the kelp forest community.4559
c13591年前2
夕恋 共回答了13个问题 | 采纳率100%
y consuming large numbers of sea urchins,sea otters act as a keystone species structuring the kelp forest community
【由于食用大量的海胆类生物,海獭构成了藻丛群落中的一类关键物种.】
at that time sea otters' population fell to the point that t
at that time sea otters' population fell to the point that they became extinct in many areas.4546
风过草叶尖1年前1
bttl 共回答了21个问题 | 采纳率95.2%
在那一时期,海獭的数量在许多海域降至他们频临灭绝的最低点.
这题逻辑应该选哪个?为什么?In the late 1980s,the population of sea otters
这题逻辑应该选哪个?为什么?
In the late 1980s,the population of sea otters in the North Pacific began to decline.There are two plausible explanations for the decline:predation,possibly by killer whales,or disease.Of these two,disease is the more likely,since a concurrent sharp decline in populations of seals and sea lions is believed to have been caused by disease,and diseases that infect these creatures are likely to be able to infect sea otters also.
Which of the following,if true,most seriously weakens the reasoning?
(A) Killer whales in the North Pacific usually prey on seals and sea lions but will,when this food source is scarce,seek out other prey.
(B) There is no indication that the sea otter population at any North Pacific location declined in the 1980s because of substantial numbers of sea otters migrating to other locations.
(C) Along the Pacific coast of North America in the 1980s,sea otters were absent from many locations where they had been relatively common in former times.
(D) Following the decline in the population of the sea otters,there was an increase in the population of sea urchins,which are sea otters' main food source.
(E) The North Pacific populations of seals and sea lions cover a wider geographic area than does the population of sea otters.
蓝雏菊1年前2
wll515 共回答了11个问题 | 采纳率90.9%
排除A 文中提到的seals and sea lions 是以传染病的例子举出来,没有提到killer whale的食物短缺.
排除C C很莫名其妙
D没有必然性,因为照传染病一说,sea urchins 也可能因此减少.
E也很莫名其妙
我觉得B最合理,是没提到substantial numbers of sea otters migrating to other locations.
off the coast of western north america,however,sea otters fe
off the coast of western north america,however,sea otters feed on the urchins and can prevent them from becoming too abundant,thereby keeping the kelp forests intact.4547 想知道prevent them from becoming 是个固定用法吗?
xuzhouhu1年前1
passaavant 共回答了14个问题 | 采纳率92.9%
Off the coast of western North America,however,sea otters feed on the urchins and can prevent them from becoming too abundant,thereby keeping the kelp forests intact
一、结构分析
* 地点状语:Off the coast of western North America,在北美西部的海面上
* 插入语:however,但是,然而
* 句子主体:sea otters feed on the urchins and can prevent them from becoming too abundant,海獭以海胆为食,以免它们(海胆)变得太丰富,
* 状语:thereby keeping the kelp forests intact 从而保持海藻繁育地纯洁.
二、语言点
off the coast—— 在海面上
feed on——以…为食,以...为能源
prevent … from doing——使...不做某事,阻止...做某事
keep + 宾语 + 形容词补足语——使得…保持…状态
三、翻译:然而在北美西部的海面上,海獭以海胆为食,以免它们繁殖过多,从而保持海藻繁育地的纯洁.
off the coast of western north america, however,sea otters f
off the coast of western north america, however,sea otters feed on the urchins and can prevent them from becoming too abundant, thereby keeping the kelp forests intact. 4547 什么意思?
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守在墙外等小红 共回答了26个问题 | 采纳率76.9%
美国西北航空公司的在海面上,然而,海獭以顽童为食,能阻止他们成为太丰富,从而保存的的海带森林完整.