Not all sounds made by animals serve as language, and we have only to turn to that extraor

Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echolocation (回声定位) in bats to see a case in which the voice plays a strictly practical role.

To get a full appreciation of what this means we must turn first to some recent human inventions. Everyoneknows that if he shouts near a wall or a mountainside, an echo will come back. The further off this solid obstacle, the longer time it will take for the return of the echo. A sound made by tapping on the main body of a ship will be reflected from the sea bottom, and by measuring the time interval between the taps andthe receipt of the echoes the depth of the sea at that point can be calculated.So was born the echo-sounding equipment, now in general use in ships. Every solid object will reflect a sound, varying according to the size and nature of the object. A shoal of fish will do this. So it is a comparatively simple step fromlocating the sea bottom to locating a shoal of fish. With experience, and with improved equipment, it is now possible not only to locate fish but to tell if it is herring, cod, or other well-known fish, by the pattern of its echo.

A few years ago it was found that certain bats emit squeaks (吱吱声) and by receiving ’he echoes they could locate and steer clear of obstacles--or locate flying insects on which they feed.This echolocation in bats is often compared with radar, the principle of which is similar.@@@@@@@ Choose correct answers to the question:

The main purpose of this passage is to ______.

A.describe that animals can make different sounds

B.prove that animals’ voices can play practical roles

C.inspire the readers to make more inventions

D.startle the readers with some shocking facts

The discovery of echolocation may help with all of the following EXCEPTA.measuring the depth of the sea

B.distinguishing different kinds of fish

C.improving the functions of radar

D.varying the size and nature of an object

By saying "A shoal of fish will do this"(Lines 6-7, Para 2), the author means ________.A.only one special kind of fish can reflect sounds

B.only one special kind of fish can be used to help locate a ship

C.a large group of fish can reflect sounds

D.a large group of fish can be used to help locate a ship

As it is discussed in the passage, the squeaks of bats can be functionally compared with ________.A.human languages

B.a mountainside

C.a shoal of fish

D.taps on a ship

Which of the following statements can be inferred from the passage?A.Animals are more intelligent than humans.

B.Humans are more intelligent than animals.

C.Animals are often compared with human inventions.

D.Humans are often inspired by animals.

请帮忙给出每个问题的正确答案和分析，谢谢！

In ancient times most cultures and civilizations made some reference to the origin of their languages. However, they did not study language by observation or experimentation--at least as far as we can judge from records that have survived to this day. Most comments on the origins of languages come to us in folk-tales or religious writings, but the Greek historian Herodotus tells us one experiment.

An Egyptian king named Psammetichos wished to find out which was the world's oldest language. To gain this information he decided to isolate two newborn babies until they began to speak. Because they were kept from adults, they would have no patterns to imitate. The king made the assumption that the children would speak what was a natural language--which would be the oldest. After some months the children were heard to make a sound which was recorded as "bekos". This was found to be very similar to the Phrygian word for "bread". Therefore Phrygian (a language once spoken in Asia Minor) was considered to be the first language of mankind. At least by King Psammetichos, and, we may assume, by his court.

The two babies were deliberately kept from adults ______ .

A．to see whether they could learn to speak without the help of adults

B．to prove that Phrygian was the first language of mankind

C．to see whether they would speak the Egyptian language

D．to discover which language would come most naturally

People of Burlington are being disturbed by the sound of bells. Four students from Burlington College of Higher Education are in the bell tower of the【C1】______and have made up their minds to【C2】______the bells nonstop for two weeks as a protest against heavy trucks which run【C3】______through the narrow High Street. "They not only make it【C4】______to sleep at night, but they are【C5】______damage to our houses and shops of historical【C6】______"said John Norris, one of the protesters.

"【C7】______we must have these noisy trucks on the roads," said Jean Lacey, a biology student, "why don' t they build a new road that goes round the town?" Burlington isn' t much more than a【C8】______village. Its streets were never【C9】______for heavy traffic. Harry Fields also studying【C10】______said they wanted to make as much【C11】______as possible to force the government officials to realize what everybody has to【C12】______"Most of them don' t【C13】______here anyway," he said, "they come in for meetings and that, and the Town Hall is soundproof, so they probably don't【C14】______It's high time they realized the problem." The fourth student, Liza Vernum, said she thought the public were【C15】______on their side, and even ff they weren't they soon would be.

I asked if they were【C16】______that the police might come to【C17】______them.

"Not really," she said, "actually we are【C18】______bell ringers. I mean we are assistant bell ringers for the church. There is no【C19】______against practising. ".

I【C20】______the church with the sound of the bells ringing in my ears.

【C1】

A．college

B．village

C．town

D．church

TV is so often a parents good friend, keeping kids happily occupied so the grownups can cook dinner, answer the phone, or take a shower. But【C1】______ that electronic babysitter is not an educational【C2】______. According to a recent research, babies who watch TV are more likely to have【C3】______ cognitive development and language at 14 months,【C4】______ if theyre watching programs【C5】______ for adults and older children. Its surprising that TV-watching made a【C6】______ at such a tender age. This new study【C7】______ 259 lower-income families in New York, most of whom spoke Spanish as their【C8】______ language at home. Other studies examining higher-income families have come to the【C9】______ conclusion: TV watching not only isnt educational, but it seems to【C10】______ babies development. Babies who watched 60 minutes of TV daily had developmental【C11】______ one-third lower at 14 months than babies who werent watching that much TV. The【C12】______ may be due to the fact that when kids and parents are watching TV, theyre【C13】______ talking, playing, and interactions that are【C14】______ to learning and development. But what about【C15】"______" TV, like Sesame Street? The researchers didnt find any pluses or minuses when【C16】______ to non-educational programs designed for small children, like Sponge-Bob SquarePants.【C17】______ research by some of the same scientists has found that parents whose children watch non-educational TV programs like SpongeBob SquarePants spend【C18】______ time reading to their children or teaching them. The latest study of educational TV programs like Sesame Street adds more【C19】______ to a recommendation from the American Academy of Pediatrics that babies under age 2【C20】______ watch no TV at all.

【C1】

A．hopefully

B．unfortunately

C．interestingly

D．unluckily