¡¡¡¡£¨A£© An animal's brain size has little bearing on its ability to master complex behaviors.
¡¡¡¡£¨B£© An animal's appearance is often influenced by environmental requirements and physical capabilities.
¡¡¡¡£¨C£© Animals within a given family group are unlikely to change their appearance dramatically over a period of time.
¡¡¡¡£¨D£© The origin of flight in vertebrates was an accidental development rather than the outcome of specialization or adaptation.
¡¡¡¡£¨E£© The pterosaurs should be classified as birds£¬ not reptiles.
¡¡¡¡5.It can be inferred from the passage that which of the following is characteristic of the pterosaurs£¿
¡¡¡¡£¨A£© They were unable to fold their wings when not in use.
¡¡¡¡£¨B£© They hung upside down from branches as bats do before flight.
¡¡¡¡£¨C£© They flew in order to capture prey.
¡¡¡¡£¨D£© They were an early stage in the evolution of the birds.
¡¡¡¡£¨E£© They lived primarily in a forest like habitat.
¡¡¡¡6.Which of the following best describes the organization of the last paragraph of the passage£¿
¡¡¡¡£¨A£© New evidence is introduced to support a traditional point of view.
¡¡¡¡£¨B£© Three explanations for a phenomenon are presented£¬ and each is disputed by means of specific information.
¡¡¡¡£¨C£© Three hypotheses are outlined£¬ and evidence supporting each is given.
¡¡¡¡£¨D£© Recent discoveries are described£¬ and their implications for future study are projected.
¡¡¡¡£¨E£© A summary of the material in the preceding paragraphs is presented£¬ and conclusions are drawn.
¡¡¡¡7.It can be inferred from the passage that some scientists believe that pterosaurs
¡¡¡¡£¨A£© lived near large bodies of water
¡¡¡¡£¨B£© had sharp teeth for tearing food
¡¡¡¡£¨C£© were attacked and eaten by larger reptiles
¡¡¡¡£¨D£© had longer tails than many birds
¡¡¡¡£¨E£© consumed twice their weight daily to maintain their body temperature
¡¡
