问题详情

Which of the following questions is most likely to represent one of the "mysteries" mentioned at the beginning of the third paragraph？
A．Do all orcas maintain the same diet, or do some specialize in certain types of prey？
B．Is the orca more closely related to whales or to dolphins？
C．Do different orca pods exhibit any form. of organization in their whale songs？
D．Do orcas view swimming humans as a desirable source of food？
E．What is the average lifespan of an orca of the offshore variety？