【阅读】The law to forbid the import and selling of nonnative species is implausible.
1. Some pet owners will be forced to turn their pet over to the authorities.
2. The law is too expensive to implement for it should examine thousands of nonnative species in US.
3. It’s unreasonable to apply one same standard to all species. Brazil rabbits can not stand the cold weather in the north so they can’t breed.
听力要点
【听力】That law is worthwhile to implement.
1. The owners’ pets don’t need to be forfeited. Only import and selling of nonnative species will be restricted.
2. The money spent in carrying out the law is much fewer than that used to remove the negative impact of nonnative species.
3. Though some animal can not breed in another country, they may carry fatal virus which can be transmitted to other animals.
【阅读】Three reasons to explain why Pterosaurs cannot fly.
1. Pterosaurs are cool-blooded, thus cannot produce enough energy to fly.
2. Pterosaurs are too weighty to take off from ground.
3. Pterosaurs have a different muscle from that of birds. Their back leg muscles are too small and weak.
听力要点
【听力】Explain three reasons to contradict with reading.
1. Pterosaurs can actually be considered as warm-blooded, since they always have dense covering hair.
2. The bone structure of Pterosaurs is different. It is hollow not solid.
3. Pterosaurs are different from birds in that they stand with four limbs while birds with two limbs. And Pterosaurs are just like bats which can push off the ground.
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