When animals make long journeys across
places where there is no food or shelter, such as deserts or oceans, it is very
important that they should be able to find their way accurately.
Birds find their way by the stars at night and by the sun
during the day. People thought that this was impossible. Then some scientists
made an experiment. They put some migrating birds(候鸟)in cages inside a
planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the
birds began to fly to the sides of the cage. Every time he moved it, the birds
moved to a new position. Scientists discovered that they always flew toward the
direction in which they would have flown if the sky had been real. This proved
that they c A. a clock that is built inside the bird B. a clock that tells correct time C. an exact sense of direction D. an accurate sense of time
更多"Directions: This task is the same a"的相关试题:
[单项选择] Directions: This task is the same as Task 1. The questions
or unfinished statements are numbered 41 to 45.
When animals make long journeys across
places where there is no food or shelter, such as deserts or oceans, it is very
important that they should be able to find their way accurately.
Birds find their way by the stars at night and by the sun
during the day. People thought that this was impossible. Then some scientists
made an experiment. They put some migrating birds(候鸟)in cages inside a
planetarium(天象图). When the operator turned the artificial sky(人造天空)round, the
birds began to fly to the sides of the cage. Every time he moved it, the birds
moved to a new position. Scientists discovered that they always flew toward the
direction in which they would have flown if the sky had been real. This proved
that they c A. Birds find their way by the stars at night and by the sun during the day. B. Birds can tell the differences between real sky and artificial sky. C. Birds can see the stars and would move when the stars change position. D. Birds always fly to the sides of the cage.
[单项选择] Task 2Directions: This task is the same as
Task 1. The 5 questions or unfinished statements are numbered 41 to 45.
Once it was considered good to keep the
car engine idle a minute or two following cold stars. Today, with modern
technology, the opposite is true. An engine operating under road conditions will
warm up faster and run more efficiently than one that is idling. Idling just
burns gas (on average, about a gallon an hour). When you have a
full tank of gas, park the ear facing downhill is possible, this will prevent
any gas from coming out of the tank. Parking in areas of less or no sunlight
helps prevent the gas from steaming that would occur if you parked in the hot
sun. Your car will stay cooler, too, and that means less gas consuming work for
the air conditioner once the engine is started. St A. to tell us how expert drivers try to save gas B. to tell us how to drive a car properly C. to tell us how to make a car run smoothly D. to tell us how to make your car consume less gas
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