L3：
Lecture 3
第一题
What is the lecture mainly about?
AHow a dolphin’s signature whistle is produced
BHow the use of technology helped researchers study dolphin whistles
CFlaws in research conducted on dolphins’ signature whistles
DEvidence that confirms a hypothesis about dolphin whistles
第二题
What led researchers to propose that dolphins produce signature whistles?
Select 2 answers
ADistinct patterns could be heard in the sounds produced by individual dolphins.
BDolphins were heard imitating the whistles of other dolphins.
CGraphs representing recorded whistles differed from one dolphin to another.
DDolphins were observed whistling most often when they were alone.
第三题
What research results supported the claim that a dolphin can distinguish between other individuals based on the whistles they make?
ADolphins often repeated the whistles of unfamiliar individuals nearby.
BSound graphs showed that mother dolphins’ whistles changed when they heard their calves’ whistles.
CDolphins raised the pitch of their own signature whistles when they recognized another individual.
DDolphins generally turned their heads only toward the signature whistles of individuals related to them.
第四题
Why does the professor mention the sounds of whistles used by humans who take care of captive dolphins?
ATo illustrate the meaning of the term“signature whistle”
BTo describe how young dolphins create their own signature whistles
CTo demonstrate that dolphin communication has similarities to human communication
DTo contrast behaviors of captive dolphins with behaviors of dolphins in the wild
第五题
What does the professor imply would result from a decrease in the size of a group of dolphins?
Select 2 answers
AThe dolphins would produce louder whistles.
BThe water between one dolphin and another would carry sound less efficiently.
CIndividual dolphins would tend to produce their signature whistles less frequently.
DIt would be easier for individual dolphins to find each other.
第六题
Why does the professor say this:
ATo remind students about information from a previous lecture
BTo help explain the design of an experiment
CTo clarify the relationship between parent dolphins and their calves
DTo warn about a common difficulty related to studying dolphins in captivity
