托福听力真题+题目+答案:Tetrapods

托福听力真题+题目+答案:Tetrapods

托福听力真题题目如下：

1、What is the lecture mainly about

A、How researchers discovered a fossil with features of both fish the tetrapods

B、Why early vertebrates made the transition from water to land

C、A discovery that challenges previous theories of vertebrate evolution

D、An examination of how animal's behavior can lead to physical changes

2、Why does the professor mention a small, bony structure in fish that coordinates breathing and eating underwater

A、To emphasize the similarities between fish and land-dwelling animals

B、To imply that elpistostegids spend more time on land than underwater

C、To explain that elpistostegids had an exceptional ability to breathe underwater

D、To explain that some organs evolved faster than others

3、What point does the professor emphasize when she mention that certain elpistostegids lacked a gill cover

A、Their necks were vulnerable to attack while they were underwater

B、They could breathe in large amount of air

C、They developed lungs more quickly than was previously thought

D、While they were on land, their necks were flexible

。。。。。。余下托福听力真题题目及答案省略！

本篇托福听力真题音频不清晰，原文为概括性总结内容，请悉知！

5元有偿下载托福听力真题+题目+答案:Tetrapods