The fossil remains of the first flying
vertebrates, the pterosaurs. have intrigued paleontologists for more than two
centuries, How such large creatures, which weighed in some eases as much as a
piloted hang-glider and had wingspans from 8 to 12 meters, solved the problems
of powered flight, and exactly what these creatures were — reptiles or birds —
are among the questions scientists have puzzled over. Perhaps
the least controversial assertion about the pterosaurs is that they were
reptiles. Their skulls, pelvises, and hind feet are reptilian. The anatomy of
their wings suggests that they did not evolve into the class of birds. In
pterosaurs a greatly elongated fourth finger of each forelimb supported a wing
like membrane. The other fingers were short and reptilian, with sharp claws. In
birds the second finger is the prin A. enormous wingspans of the pterosaurs enabled them to fly great distances B. structure of the skeleton of the pterosaurs suggests a close evolutionary relationship to hats C. fossil remains of the pterosaurs reveal how they solved the problem of powered flight D. pterosaurs were reptiles
更多"{{B}}Passage 4{{/B}}
Th"的相关试题:
[单项选择]{{B}}Passage 4{{/B}}
The fossil remains of the first flying
vertebrates, the pterosaurs. have intrigued paleontologists for more than two
centuries, How such large creatures, which weighed in some eases as much as a
piloted hang-glider and had wingspans from 8 to 12 meters, solved the problems
of powered flight, and exactly what these creatures were — reptiles or birds —
are among the questions scientists have puzzled over. Perhaps
the least controversial assertion about the pterosaurs is that they were
reptiles. Their skulls, pelvises, and hind feet are reptilian. The anatomy of
their wings suggests that they did not evolve into the class of birds. In
pterosaurs a greatly elongated fourth finger of each forelimb supported a wing
like membrane. The other fingers were short and reptilian, with sharp claws. In
birds the second finger is the prin A. revolutionary B. unlikely C. unassailable D. probable
[简答题]Passage One How to Get Preserved as a Fossil There are several ways into which animals and plants may become fossilized.
[简答题]Passage One How to Get Preserved as a Fossil Unfortunately the changes of any animal become a fossil are not very great, and
[简答题]Passage One How to Get Preserved as a Fossil It is not surprising that all the millions of animals that have lived in the past.
[单项选择]{{B}}Passage B{{/B}}
Questions 25 to 30 are based on
the passage you have just heard. | A. 9:00 to 10:00. B. 9:00 to 10:30. C. 9:30 to 11:00. D. 9:30 to 11:30.
[填空题]{{B}}Section B{{/B}} Passage One
{{B}} Questions 52 to 56 are based on the
following passage.{{/B}} BRITAIN’S universities are in an awful
spin. Top universities were overwhelmed by the 24% of A-level applicants with
indistinguishable straight As newer ones are beating the byways for
bodies. Curiously, both images of education—the weeping willows
of Cambridge and the futuristic architecture of UEL—are cherished by the
government. Ministers want to see half of all young people in universities by
2010 (numbers have stalled at 42%), without letting go of the world-class
quality of its top institutions. Many argue that the two goals
are incompatible without spending a lot more money. Re searchers scrabble for
funds, and students complain of large classes and reduced teaching time. To help
solve the problem, the government agreed in 2 A. A.They are confident of changing it. B.They are much disturbed by it. C.They find it natural in the market. D.They cherish it with a nostalgic mood.
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