灵鹊做题网Why don't birds get lost on their long travel flights?Scient
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Why don't birds get lost on their long travel flights?Scientists haven't understood this q____ for many years.Now they are b____ to know it.
Not long ago,experiments s____ that birds can guide them during daylight hours in the sun.But what about them by n____?Some night-flying birds are able to f____ the stars in their flights.
One such bird had spent its lifetime in a cage and n____ flown in the sky.But it can u____ the stars to guide in its flight.Any change in the direction of the stars made a change in the direction of its flight.
What do they do when stars can't be s____?They f____ their way by such landmarks as mountains or rivers.But when it's too dark to see these,they can l____their direction.
Not long ago,experiments s____ that birds can guide them during daylight hours in the sun.But what about them by n____?Some night-flying birds are able to f____ the stars in their flights.
One such bird had spent its lifetime in a cage and n____ flown in the sky.But it can u____ the stars to guide in its flight.Any change in the direction of the stars made a change in the direction of its flight.
What do they do when stars can't be s____?They f____ their way by such landmarks as mountains or rivers.But when it's too dark to see these,they can l____their direction.
Why don't birds get lost on their long travel flights?Scientists haven't understood this qustion for many years.Now they are begining to know it.
Not long ago,experiments showed that birds can guide them during daylight hours in the sun.But what about them by night?Some night-flying birds are able to follow the stars in their flights.
One such bird had spent its lifetime in a cage and never flown in the sky.But it can use the stars to guide in its flight.Any change in the direction of the stars made a change in the direction of its flight.
What do they do when stars can't be seen?They find their way by such landmarks as mountains or rivers.But when it's too dark to see these,they can lose their direction.
Not long ago,experiments showed that birds can guide them during daylight hours in the sun.But what about them by night?Some night-flying birds are able to follow the stars in their flights.
One such bird had spent its lifetime in a cage and never flown in the sky.But it can use the stars to guide in its flight.Any change in the direction of the stars made a change in the direction of its flight.
What do they do when stars can't be seen?They find their way by such landmarks as mountains or rivers.But when it's too dark to see these,they can lose their direction.
We haven't met for a long time.Why don't you o______ a get-t
we haven't met for a long time why don't you o___ a get-toge
Don't Get Up On
Why Don't You Get A Job,
英语翻译Why Can’t Chicken Fly?Long long ago,when the birds flew
Why don't they come back to their motherland?
Don't get on my nerves
don't let them get on you
don't get me started on gravity.
Why don't you enter for the long jump?
your hair is to long,Why don't
英语翻译some birds don’t mean to be caged .Their feathers are ju