科目: 來源:天津同步題 題型:閱讀理解
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科目: 來源:天津同步題 題型:閱讀理解
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科目: 來源:天津同步題 題型:閱讀理解
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科目: 來源:天津同步題 題型:閱讀理解
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科目: 來源:同步題 題型:閱讀理解
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科目: 來源:同步題 題型:閱讀理解
Just like humans, birds too rely on sound to communicate.However, they do not have a "language" in
the true sense of the word and instead produce a variety of sounds to convey different emotions.
Often, birds recognize their mates (or young) by sound rather than sight.Hungry young birds use
begging calls to let their mothers know it is feeding time.Alarm calls, flight calls and warning calls are other sounds made frequently by adults.
A new study shows that songbirds rehearse (排演) their songs even in their sleep.The activity in the
brain of the birds when asleep is similar to the brain activity when the birds were awake and singing.The
team used tiny recording devices to measure the activity of individual brain cells in four songbirds both
when they were singing and when they were asleep.
Apparently the bird stores a song after hearing it, and then rehearses it later in its sleep.Scientists now
believe the birds "dream of songs and tunes" to help them master the fine art of singing and that sleep
plays a key role in the learning process!
Many songbirds learn to sing listening to adult birds of the same species.However, if separated from
the adults, the young birds develop sounds which are hard to understand instead of normal song patterns.
Researchers carried out an experiment in which a male bullfinch (灰雀) was raised by a female canary
(金絲雀). The bullfinch soon learned the canary's song and when it was later mated to a female bullfinch, Mr.Bullfinch taught his children the canary's songs.
Last year, a British survey of London's songbirds showed that the city's birds are losing their tunes.
Birds could hardly hear one another, over the traffic noise;as a result, instead of copying the sweet
notes of the adults, young birds were copying the sounds they heard most often, namely car horns and
beeping cellphones!
1. According to the passage, birds recognize their mates by ________.
A. using their own words
B. listening to their sounds
C. looking at their appearances
D. singing the same songs
2. What kind of calls might a young bird make most often according to the passage?
A. Flight calls.
B. Alarm calls.
C. Begging calls.
D. Warning calls.
3. The story of Mr.Bullfinch suggests that ________.
A. young birds learn to sing from whom they live together with
B. birds only learn how to sing from the same adult species
C. it's not easy for adult birds to teach young birds songs
D. a canary's song is more beautiful than a bullfinch's
4. From the last paragraph we know that ________.
A. traffic noise makes young birds become deaf
B. birds in the city can sing as sweetly as those in the wild
C. birds in the city recognize their mates mainly by sight
D. noise pollution causes much trouble for birds in the city
5. What can we infer from the passage?
A. The eyesight of songbirds is very poor in most cases.
B. There's no brain activity when a bird is sleeping.
C. Birds have something in common with humans in terms of communication.
D. Different songbirds usually develop the same song patterns.
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科目: 來源:同步題 題型:填空題
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科目: 來源:陜西省同步題 題型:完形填空
| 完形填空 | ||||
| Although in 1947 we were still very new to the atomic (原子的) age, we knew about mushroom clouds. A huge crack (裂縫) spread across the library wall upstairs, sending teachers and __1__ screaming down the hall. Had a new world war started? Palefaced, our young science teacher quickly__2__us for a fire drill. We huddled (卷縮) in little groups on the beach side of the school grounds and__3__the spreading cloud darken the bright spring sky. Rumors flew every which way, __4__two hours would pass before we got the full story. One rumor we heard was that the Texas City Monsanto Chemical plant had__5__; children whose parents__6__ there began to cry. I__7__-that was where my father was working that day. The school bell called us back inside, and we were dismissed (解散) to__8__our way home the best way we could. I'd walked a quarter of the threemile trip to my home__9__a car horn frightened me to __10__. My Uncle Barney__11__alongside me in his old Ford. The instant I saw him, I knew my father __12__. Otherwise, Papa would have__13__for me himself. As if in slow motion from a great distance, Uncle Barney motioned for me to__14__. Numb with grief, I crawled into the back__15__. I barely took notice of the man sitting there, and didn't recognize him until he__16__me. When Papa put his strong arms around me, I forgot for a moment that Cherokees aren't supposed to__17__. Many of my fellow students lost their__18__in the explosion. Tragedy would one day come to our__19__, as it inevitably (不可避免地) comes to all, but one day Texas City blew up, it miraculously (奇跡般地) passed us by. Because he lost his keys on that April morning, as he explained, my father lived for__20__32 years-we were to have a second lifetime forever. | ||||
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科目: 來源:江蘇同步題 題型:閱讀理解
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科目: 來源:江蘇同步題 題型:閱讀理解
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