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根据下列文章,请回答 51～65 题。 The Greatest Mystery Of Whales The whale is a warm-blo

根据下列文章,请回答 51～65 题。

The Greatest Mystery Of Whales

The whale is a warm-blooded, air-breathing animal, giving birth to its young alive., sucking them and, like all mammals, originated on land. There are many __________(1) of this. Its front flippers (鳍状肢), used for steering and stability, are traces of feet.

Immense strength is__________2) into the great body of the big whales, and in fact most of a whale's body is one gigantic muscle. The blue whale's pulling strength has been estimated __________ (3) 400 horsepower. One specimen was reported to have towed (拖) a whaling vessel for seven hours at the__________ (4) of eight knots (节).

An angry whale will __________ (5) a ship.

A famous example of this was the fate of whaler Essex (6) was sunk off the coast of South America early in the last century. More recently, steel ships have__________ (7) their plates buckled (使弯曲) in the same way. Sperm whales (抹香鲸) were known to seize the old-time whaleboats in their jaws and crush them.

The greatest __________ (8) of whales is their diving ability. The sperm whale dives to the bottom for his __________ (9) food, the octopus (章鱼). In that search he is known to go as far down as 3,200 feet, where the __________ (10) is 1,400 pounds, to a square inch. 13oing so he will __________ (11) underwater long as one hour. Two special skills are involved in this: storing up enough __________ (12) (all whales are air-breathed) and tolerating the great change in pressure. Just how he does it scientists have not__________ (13). It is. believed that some of the oxygen is stored in a special __________ (14) of blood vessels, rather than just held in the lungs. And it is believed that a special kind of oil in his head is some sort of compensating mechanism that __________ (15) adjusts the internal pressure of his body. But since you can't bring a live whale into the laboratory for study, no one knows just how these things work.

第 51 题

A．aspects

B．signs

C．ways

D．reasons

答案

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发布时间：2021-04-15

更多“根据下列文章,请回答 51～65 题。 The Greatest Mystery Of Whales The whale is a warm-blo”相关的问题

第1题

根据下列文章,请回答 51～65 题。第 51 题请选择（1）处最佳答案。

根据下列文章,请回答 51～65 题。

根据下列文章,请回答 51～65 题。第 51 题请选择（1）处最佳答案。根据下列文章,请回答

第 51 题请选择（1）处最佳答案。

根据下列文章,请回答 51～65 题。第 51 题请选择（1）处最佳答案。根据下列文章,请回答

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第2题

根据下列文章,请回答 51～65 题。 The American Parnily In the American family the husban

根据下列文章,请回答 51～65 题。

The American Parnily

In the American family the husband and wife usually share important decision making. When the children are ____________ (1) enough, they take part as well. Foreigners are often surprised by the permissiveness (宽容) of American parents. ]he old rule that "children should be seen and not heard" is rarely ___________ (2), and children are often allowed to do ___________ (3) they wish without strict control of their parents. The father seldom expects his children to listen to him ___________ (4) question, and children are encouraged to be ___________ (5) at an early age. Some people believe that American parents carry this freedom ___________ (6) far. Others think that a strong father image would not ___________ (7) the American values of equality and independence. Because Americans emphasize the importance of independence, young people are expected to ___________ (8) their parental families by the time they haw ___________ (9) their late teens or early twenties. Indeed, not to do so is often regarded as a (10), a kind of weak dependence.

This pattern of independence often results in serious ___________ (11) for the aging parents of a small family. The average American is expected to live ___________ (12) the age of 70. The job-retirement age is ___________ (13) 65. The children have left home, married, and ___________ (14) their own households. At least 20 percent of all people over 65 do not have enough retirement incomes ____________ (15) the major problem of many elderly couples is not economic. They feel useless and lonely with neither an occupation nor a close family group.

第 51 题

A．senior

B．junior

C．old

D．young

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第3题

根据下列文章，回答 51～55 题。第 51 题 The main idea of this passage is to

根据下列文章，回答 51～55 题。

根据下列文章，回答 51～55 题。第 51 题 The main idea of this pa

根据下列文章，回答 51～55 题。第 51 题 The main idea of this pa

第 51 题 The main idea of this passage is to

根据下列文章，回答 51～55 题。第 51 题 The main idea of this pa

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第4题

根据下列文章，回答 51～55 题。第 51 题 Why was Kohoutek referred to as“the comet of t

根据下列文章，回答 51～55 题。

根据下列文章，回答 51～55 题。第 51 题 Why was Kohoutek referre

第 51 题 Why was Kohoutek referred to as“the comet of the century”？

根据下列文章，回答 51～55 题。第 51 题 Why was Kohoutek referre

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第5题

根据下列文章，回答 51～55 题。第 51 题 The limited time and space which man occupies

根据下列文章，回答 51～55 题。

根据下列文章，回答 51～55 题。第 51 题 The limited time and spa

第 51 题 The limited time and space which man occupies suggest, according to the paragraph,

根据下列文章，回答 51～55 题。第 51 题 The limited time and spa

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第6题

根据下列文字，回答 51～65 题。第 51 题回答第1空。

根据下列文字，回答 51～65 题。

根据下列文字，回答 51～65 题。第 51 题回答第1空。根据下列文字，回答 51～65 题。

第 51 题回答第1空。

根据下列文字，回答 51～65 题。第 51 题回答第1空。根据下列文字，回答 51～65 题。

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第7题

根据下列文章，请回答 51～55 题。第 51 题 This passage could be entitled_____

根据下列文章，请回答 51～55 题。

根据下列文章，请回答 51～55 题。第 51 题 This passage could be e

第 51 题 This passage could be entitled_____

根据下列文章，请回答 51～55 题。第 51 题 This passage could be e

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第8题

根据下列文章,请回答 51～65 题。 Preferences Vary on Circumstancesof Dying Amongtermina

根据下列文章,请回答 51～65 题。

Preferences Vary on Circumstancesof Dying

Amongterminally(晚期)ill people，attitudes differ on what they think constitutes a__________(1)orbad death，the results of a new study suggest．

Dr．ElizabethK．Vig of the University of Washington in Seattle and colleagues interviewed 26men with_________(2)heart disease or cancer．The men were asked to describe goodand bad deaths，and they also answered_______________(3)about their preferencesfor dying．

“In this small study．Terminally ill mendescribed good and bad deaths _________(4)。”Vig said．“They did not hold thesame views about such Issues ________ (5)the presence of others at the very endof life or preferred location of death．

Manyof the men considered________(6)in their sleep to be a good death．The reasonswere varied and included not_________(7)that death was imminent(即将发生的)，and thatdeath would be painless．For close to half of the men，a prolonged(拖延的)death was___________(8)abad death．Some of the men associated a prolonged death with prolonged pain，_______(9)others thought a prolonged death would be difficult for their families．

Mostmen said that their_________(10)were very important to them，but this did not mean that they wanted relatives close atthe_________(11)of death．"Valuii‘19 family did not als0___________(12)wantingfamily present at the very end of life。”Vig said．

“In fact，some expressed concerns_________(13)burdening loved ones，”Vig said．For instance．some men were worriedabout the emotional or_________(14)impact on their family members，according tothe Washington researcher．Some were worried _______(15)their need for carewould be a burden on their families，she said．

第 51 题

A．wrong

B．pure

C．good

D．whole

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第9题

根据下列文章，回答 51～55 题。第 51 题 This passage is mainly about_____

根据下列文章，回答 51～55 题。

根据下列文章，回答 51～55 题。第 51 题 This passage is mainly a

第 51 题 This passage is mainly about_____

根据下列文章，回答 51～55 题。第 51 题 This passage is mainly a

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第10题

根据下列文章,请回答 51～65 题。 A Special Clock Every Living thing has what scientists

根据下列文章,请回答 51～65 题。

A Special Clock

Every Living thing has what scientists call A biologiCal clock that controls behavior．The biologiCal clock___________(1)plants when to form. flowers and when the flowers should open．It tells insects when to __________ (2)the protective cocoon(防护卵袋)and．fly away，and it tells animals and．human beings when to eat sleep and wake．

Events outside the plant and．animal___________ (3) the actions of some biologiCal clocks．Scientists recently found，for example that A tiny animal changes the color of its fur because of the___________l4)of hours of daylight．In the short__________ (5)of winter, its fur becomes white。The’ fur becomes gray brown in__________(6)in the longer hours of daylight in summer．

Inner signals control other_______ (7)clocks．German scientists found．that some kind．of internal clock seems to order birds to begin their long migration_______ (8)twiCe each year．Birds _______(9) from flying become restless when it is time for the trip，___________(1O)they become calm again when the time of the flight has ended．

Scientists say they are beginning to Learn whiCh _______ (11)of the brain contain biologiCal clocks．An AmeriCan researcher, Martin Moorhead．said．A small group of cells near the front of the brain_______ (12)to control the timing of some of our actions．These_______ (13)tell A person when to wake，when to_______ (14)and．whel7ito seek food．Scientists say there probably are other biologiCal clock cells that_______ (15)other body activities．

第 51 题

A．says

B．asks

C．tells

D．talks

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