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必修5《Listening and vocabulary》精品PPT课件优质课下载
5. What makes a pterosuar different from a bird?
1. What was a pterosaur?
2.Were the pterosaurs dinosaurs?
3. When did the pterosaurs live?
4. How big were the lagrest pterosaur ?
5. What makes a pterosuar different from a bird?
Part1
Fill in the blanks
1.locomotion 2. presumably 3.sustained 4.elongated 5.glider
6. wingspan 7. a flap of 8. arose 9. literally 10. served as
The first flying vertebrates were true reptiles in which one of the fingers of the front limbs became very( ), providing support for( )stretched skin that( )a wing. These were the pterosaurs, ( )the winged lizards. The earliest pterosaurs( ) near the end of the Triassic period of the Mesozoic Era, some 70 million years before the first known fossils of true birds occur, and they ( )dominated the skies until they were eventually displaced by birds. Like the dinosaurs, some the pterosaurs became gigantic; the largest fossil discovered is of an individual that had a ( )of 50 feet or more, larger than many airplanes. These flying reptiles had large, tooth-filled jaws, but their bodies were small and probably without the necessary powerful muscles for ( )wing movement. They must have been expert( ), not skillful fliers, relying on wind power for their ( ).
1. What was a pterosaur?
2. Were the pterosaurs dinosaurs?
3. When did the pterosaurs live?
4. How big were the lagest pterosaur?
5. what makes a pterosuar different from a bird?
4.elongated
7. a flap of
10. served as
2. presumably
6. wingspan
3. sustained
5. gliders
1.locomotion
9. literally