首页
登录
职称英语
Since there is such an abundance of food in the sea, it is understandable th
Since there is such an abundance of food in the sea, it is understandable th
游客
2025-04-20
20
管理
问题
Since there is such an abundance of food in the sea, it is understandable that some of the efficient, highly adaptable, warm-blooded mammals that evolved on land should have returned to the sea. Those that did do that have flourished. Within about 50 million years—no time at all, geologically speaking —one of the four kinds of mammals that has returned to a marine environment has developed into the largest of all animal forms, the whale. A second kind, the seal, has produced what is probably the greatest population of large carnivorous mammals on Earth. This suggests that these "top dogs" of the ocean are prospering and multiplying. However, such has not been the case, at least not for the last 150 years. Trouble has closed in on these mammals in the form of equally warm-blooded and even more efficient and adaptable predators, humans. At sea, as on land, humans have now positioned themselves on top of the whole great pyramid of life, and they have caused serious problems for the mammals of the sea.
There is a simple reason for this. Marine mammals have the misfortune to be swimming aggregates of commodities that humans want: fur, oil, and meat. Even so, they might not be so vulnerable to human depredation if they did not, like humans, reproduce so slowly. Every year humans take more than 50 million tons of fish from the oceans without critically depleting the population of any species. But the slow-breeding mammals of the sea have been all but wiped out by humans seeking to satisfy their wants and whims. [br] It can be inferred from the passage that marine mammals are like humans in which of the following ways?
选项
A、They survive despite changes in their metabolic rates.
B、They reproduce slowly.
C、They are prospering and multiplying.
D、They are depleting the vegetation of the seas.
答案
B
解析
根据文章第二段第三句“Even so,they might not be so vulnerable to human depredation if they didnot,like humans,reproduce so slowly.”可知,如果它们的繁殖速度不像人类那样缓慢,面对人类的掠夺它们也不会显得如此脆弱。所以可以推知海洋哺乳动物和人类的共同点就是繁殖速度缓慢。据此判断,答案是B。
转载请注明原文地址:https://tihaiku.com/zcyy/4045489.html
相关试题推荐
Sincethereissuchanabundanceoffoodinthesea,itisunderstandableth
Sincethereissuchanabundanceoffoodinthesea,itisunderstandableth
Sincethereissuchanabundanceoffoodinthesea,itisunderstandableth
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
Nowadaysthescatteringofgalaxiesandtheastoundingabundanceofstarsar
随机试题
十岁的雷西安-尼尔是个理想的哥哥,他总是乐意陪妹妹上学,替爸爸妈妈跑腿去商店买东西。【T1】虽然他于上个周末不幸去世,但这并没有停止他继续帮助他人
Ifwe______earlier,wewouldnothavemissedthebus.A、leftB、hadleftC、have
Onesummernight,onmywayhomefromworkIdecidedtoseeamovie.Iknew
内源融资的特点不包括()。A.原始性 B.自主性 C.高效性 D.低成
工程质量缺陷的处理方案通常应由( )提出。A.设计单位 B.建设单位 C.
符合萎缩的描述是()A.萎缩器官不能恢复原状 B.萎缩器官间质细胞减少
下列哪项不属于质量管理的原则( )。 A、以单位工程保证群体工程 B、以
下列关于我国的国债,说法错误的是()。A.储蓄国债包括凭证式和电子式 B
关于行政诉讼的现场笔录的说法哪一项是错误的?()A.现场笔录必须由当事人和
根据对顶板和围岩地压管理方法的不同,采矿方法分为()。 A.爆破
最新回复
(
0
)