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.
Conversation 6浏览器不支持音频Question-C 6.1浏览器不支持音频
A. To get suggestions about what to include in her next presentation
B. To get information about a program that he had mentioned in class
C. To follow up on a question she had raised in class
D. To update him on a research project she is helping him organize
Question-C 6.2浏览器不支持音频
A. It permits government engineers to work on private construction projects.
B. It helps private companies buy facilities that were built by the government.
C. It enables private companies to operate public facilities that the government builds.
D. It enables public facilities to be constructed without government funding.
Question-C 6.3浏览器不支持音频
A. To give an example of the economic model the woman is interested in
B. To help clarify one of the goals of the Global Enrichment Initiative
C. To explain why it is appropriate for him to teach a seminar about coffee
D. To correct a common misperception about Brazil’s economy
微信支付 
支付宝支付