首页
登录
职称英语
Whale Falls 1. The whale is a kind of marine mammal ■ 【T1】_________size
Whale Falls 1. The whale is a kind of marine mammal ■ 【T1】_________size
游客
2023-10-24
14
管理
问题
Whale Falls
1. The whale is a kind of marine mammal
■ 【T1】_________size 【T1】_________
■ Warm-blooded
■ Air-breathing
2. Lifespan of whales
■ The lifespan varies from one species to another
■ Average is about 【T2】________years 【T2】_________
■ 【T3】________can live more than 200 years 【T3】_________
3. Whale falls
■ The dead whale sinks to the 【T4】________ 【T4】_________
■ Many species live in it
■ 【T5】_________to find whale falls in the ocean 【T5】_________
4. The first stage feeders of a whale fall
■ Messy eaters—traveling fish and sharks
■ Scavenging the dead whale’s soft flesh or 【T6】________ 【T6】_________
■ Several months to two years long
5. The second stage of decomposition
■ Shrimp-like creatures and crustaceans 【T7】_________
■ Hairy 【T7】_________which feeds on the whalebones
■ Lasting up to 【T8】_________years 【T8】_________
6. The third and final stage
■ Clams live off sulfide—a gas that 【T9】_________give off 【T9】_________
■ More than 【T10】_________species live on a single whale
skeleton 【T10】_________
■ Last for decades [br] 【T8】
Whale Falls
Good morning, everyone! Today we are going to talk about a kind of marine mammal. Their calls can be haunting. Their size can take your breath away. And their worlds are dark and quiet. Yes, we are going to talk about whales, to be exact, something about the death of whales.
There are many different species of these huge, warm-blooded, air-breathing mammals that live in the sea. There is the blue whale and the killer whale, the humpback and the orca, just to name a few.
According to several science websites, whales live a long time. There are many different species of whales and each has a different lifespan. The average lifespan, however, is about 50 years. In the wild whales live for a long time. Bowhead whales spend their lives in the cold Arctic waters. They may be the world’s oldest mammals, living possibly more than 200 years!
As they lived, these giants of the sea die big. Before gases develop in the body, or carcass, of a dead whale it sinks to the ocean floor. This is called a "whale fall" and it supplies room and board, in other words, food and shelter, to thousands of ocean creatures for many decades.
Scientists have only recently discovered just how many species live in a whale fall. This is mostly because of the difficulty in finding whale falls in the ocean. It is like trying to find a needle in a haystack, as we like to say.
The smell of the dead whale brings the first stage of feeders — the traveling, or mobile scavengers. A wide variety of fish and sharks come from miles and miles to scavenge the dead whale’s soft flesh or tissue. This phase can last as short as several months to as long as two years.
As you can imagine, these first stage scavengers are messy eaters. Their feeding frenzies leave a thick layer of pieces of the whale, what scientists call biomaterial, on the sea floor. This is when the dinner bell rings for the second stage scavengers.
During the second stage of decomposition strange creatures appear. Shrimp-like creatures, crustaceans such as crabs and mollusks eat the small pieces of whale tissue that has dropped to the ocean floor. Hairy worms are also part of this stage. They feed on the whalebones making the whale carcass look like a carpet - a moving, living carpet. This phase can last up to two years.
The third and final stage is the longest. It can last for decades. The flesh of the whale has long been eaten. But even the bones support life. As the whale bones decay, they produce sulfide, a type of gas. This gas supports a rich variety of life. Worms, mussels and several types of clams live off the gas that the whalebones give off.
Researchers found more than 30, 000 animals totaling more than 200 species on one, single whale skeleton. Scientists who have studied the life of a whale fall found that the community of life and rare species of this final stage is larger than any known community on the deep seafloor.
Ok, having talked so much about the stages of a whale fall, I hope that you can have a complete picture of what a whale fall is and understand that whales never die on the ocean floor.
选项
答案
two
解析
数字题。由录音可知第二阶段的分解可以持续长达两年的时间。
转载请注明原文地址:https://tihaiku.com/zcyy/3125426.html
相关试题推荐
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
WhaleFalls1.Thewhaleisakindofmarinemammal■【T1】_________size
随机试题
PASSAGETHREENews.本文要求判断文章最有可能属于哪种体裁。根据文章的内容,可以看出这篇文章对近年来发生的一些事件的报道,也包括对相关人员的采访。
Thepeoplewhoobjectedtothenewapproachweretoldthatsinceworkhadalread
MostBritishcouples,whetherreligiousornot,haveachurchwedding,which
插入在文本中的图形可以通过()来放大或缩小。A.鼠标的拖动 B.单击鼠标右键
软件商标权的保护对象是指()。A.商业软件 B.软件商标 C.软件注册商标
在代收代付业务中,不属于消费者应尽的义务的是()。A.在银行开立结算账户
A.库瓦西耶征阳性 B.上腹部轻压痛 C.左季肋部触及囊性肿物 D.位于腹
当某商品的供给和需求同时增加后,该商品的均衡价格将()。A.上升 B.下降
外来务工人员刘某在为其子办理小学入学报名手续的过程中,被要求到户籍所在地派出所开
(2019年真题)某水泥厂项目对所有网格点PM2.5年均浓度贡献值为1.25ug
最新回复
(
0
)