Lecture浏览器不支持音频Question L1浏览器不支持音频
A. The structure of the blind mole rats’ underground tunnel system
B. How blind mole rats find their way back to their nests
C. Whether some animals use Earth’s magnetic field for navigation
D. Whether blind mole rats have more than one navigation system
Question L2浏览器不支持音频
A. To emphasize the blind mole rat’s need for two navigation systems
B. To explain one reason why blind mole rats get lost
C. To give examples of landmarks used by the blind mole rat
D. To describe the materials the blind mole rat uses to build its nest
Question L3浏览器不支持音频
A. To prevent a misunderstanding about blind mole rats’ tunnel systems
B. To indicate how the researchers found the animals for the experiment
C. To describe similarities between blind mole rats’ natural habitat and those of other animals
D. To emphasize the importance of habitat design to the success of the experiment
Question L4浏览器不支持音频
A. They removed the food from the habitat.
B. They increased the distance between the nest and the food source.
C. They changed the magnetic field around the habitat.
D. They shifted the location of obstacles in the tunnels.
Question L5浏览器不支持音频
A. One system is more accurate than the other for long trips.
B. One system takes more time to use than the other one does.
C. Individual blind mole rats have a preference for one system or the other.
D. Animals usually do not rely on only one navigation system for long trips.
微信支付 
支付宝支付