题目内容
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The word "sight" in the first para. Means ______.
A．a small present or gift
B．a kind of postcard
C．the power of seeing
D．something that you can see
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Television works in much the same way as radio.In radio, sound is changed into electromagnetic waves which are sent through the air.Experiments leading to modern television took place more than a hundred years ago.By the 1920s inventors and researchers had turned the early theories into working models.Yet it took another thirty years for TV to become industry.
The influence of TV on the life of the people is incalculable: it can influence their thoughts and their way of life.It can also add to their store of knowledge.Educational TV stations offer teaching in various subjects.Some hospitals use TV for medical students to get close-up views of operations.At first television programs were broadcast in black-and-white.With the development of science and technology, the problem of how to telecast them in full color was solved and by the middle 1960s the national networks were broadcasting most of their programs in color.
The programs that people watch are not only local and national ones.Since the launching of the first communications satellite, more and more programs are telecast ‘live’ from all over the world.People in San Francisco were able to watch the 1964 Olympic Games in Tokyo.And live telecasts now come form. outer space.In 1969, the first astronauts to land on the moon televised their historic ‘moon walk’ to viewers on the earth.Since then, astronauts have regularly sent telecast to the earth.
1.The launching of communications satellites make it possible for people in San Francisco to ________.
A.get close-up views of operations
B.watch the 1964 Olympic Games in Tokyo
C.store knowledge
D.watch national programs
2.The development of science and technology made it possible for television programs to ______.
A.be telecast in San Francisco B.be telecast in full color
C.be telecast in Tokyo D.be telecast in black-and-white
3.The word ‘incalculable’ means _____.
A.easy to tell
B.difficult to tell
C.very great
D.very small
4.Television is said to be the modern wonder of electronics, because_____.
A.it influences people’s way of life
B.it brings the world into people’s own home in sight and sound
C.it works as radio
D.it makes people see far
5.Television became an industry in ______.
A.1950
B.the 1950s
C.the 1920s
D.the 1960s
The smallest bat in the world is from Southeast Asia.This kind of bat measures about 30 millimeters in length. The world's largest bat, the Giant Golden-Crowned Flying Fox, has a wingspan of 1.5 meters.Most bats eat insects,but many feed on fruit or nectar from flowers.
Many people think bats are blind,but this is not true.Many species have very good sight.Most bats communicate and find their way by making"echolocation" (回声定位法 ) noises.They produce high-frequency noises and can estimate the distance of an object by using the sound echoes that bounce back to them. So, while bats may travel in total darkness, they"see"using sound.
Sadly, bats are widely feared and misunderstood. Most bats come out of their shelters only at nightfall. Three bat species feed on blood. Because of these qualities, bats have long been linked in many cultures to death, darkness and blood-drinking.
Yet bats are important for agriculture and our environment. They help pollinate (授粉)plants and spread seeds. They also help control insects. Bats eat huge numbers of insects,including kinds that damage crops.
For example, a brown bat can eat more than 1,000 insects in one hour.Onereport says bats save American farmers billions of dollars every year by reducing crop damage and limiting the need for chemicals that kill insects.
Over one-fifth of all bat species are under threat. They face disease and the human destruction of their natural environments.In some areas, diseases have killed nearly 100% of bat populations.
第21题 The United Nations declared 2011 to 2012 the Year of the Bat,because bats_____.
A.are beneficial animals B.are close to extinction
C.have been misunderstood D.are under serious threat
第22题 Bats can fly in total darkness, because_____.
A.their eye sight is extremely sharp
B.they can fly without using their sight
C.they don't have eye sight in daytime
D.they are very familiar with their environment
第23题 Many people fear bats because_____.
A.many cultures connect bats with unpleasant things
B.bats are very ugly in appearance
C.bats are thought to be blind
D.bats carry deadly diseases with them
第24题 It can be concluded that_____.
A.bats are more easily to be killed by diseases
B.bat population has been reduced sharply these days
C.bats can help farmers save crops and money
D.bats' living environment has been mostly destroyed
第25题 The word" nectar" in the second paragraph probably means_____.
A.the flowers' eyes B.the flowers' leaves
C.the smell produced by flowers D.the liquid produced by flowers
They should never try to pursue profit health and life of people.
A、in terms of
B、at sight of
C、at the expense of
Horses have more highly developed______of sight and hearing than humans.
A．senses
B．skills
C．customs
D．abilities
