Although there are plenty of flightless bird species on Earth，the parlor roller pigeon（鴿子）is believed to be the only one selectively bred（養(yǎng)殖）by humans until it lost its capacity to take to the skies and developed a completely new and strange means of getting around-backflips（后空翻）.
Seeing a parlor roller pigeon roll on the ground，you would think it might go crazy，but in reality，the bird is rolling on the ground because it comes naturally to it.No one knows exactly how or when the breed was created，but experts and enthusiasts assume that its origin can be traced back to the mid-19th century when someone probably encountered a specimen with a slight tendency to roll on the ground and decided it was worth emphasizing via selective breeding.It is believed that over years of selective breeding，pigeons that rolled over long distances were obtained.
The parlor roller is a common-looking pigeon that weighs about between 200- and 280 grams and comes in a variety of colors.What sets it apart from any other pigeon breed is its inability to fly，and its tendency to continuously do backflips on the ground，especially when encouraged.Interestingly，parlor rollers are physically equipped to fly and are not heavier than other pigeon breeds.Some believe they have some shortcomings in the balance centers of the brain that cause them to roll on the ground instead of flying.
Doing backflips is what these pigeons are good at and what they are bred for.Fanciers will roll them on the ground like bowling balls，just to get them started.The birds will then continue to roll for up to a few hundred feet.The current record for the longest roll sits at 662 feet.
Although parlor roller pigeons are very popular among fanciers，animal lovers consider it cruel to strengthen what they consider a disability.
（1）What does the text say about the origin of the parlor roller pigeon？ AA
A．It still remains unclear.
B．It is very misleading.
C．It has been proven scientifically.
D．It is of little significance.
（2）Why is the parlor roller pigeon different from the other pigeons？ DD
A．It is especially good-looking.
B．It is physically equipped to fly.
C．It has a strong sense of balance.
D．It has the ability to do backflips.
（3）What is animal lovers' attitude to fanciers' strengthening the parlor roller pigeon's tendency？AA
A．Disapproving.
B．Supportive.
C．Indifferent.
D．Ambiguous.
（4）In what section of a magazine may this text appear？ CC
A．Travel.
B．Art.
C．Nature.
D．History.
【考點(diǎn)】說明文；環(huán)境保護(hù)．
【答案】A；D；A；C
【解答】
【點(diǎn)評(píng)】
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發(fā)布：2024/4/20 14:35:0組卷：0引用：1難度：0.5
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C．Getting close to nature reduces crime.
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