单项选择题

In the US, psychologists at a number of universities are making a serious study of how rumors are born, how they ______ and how they can finally be killed off.

A．congregate
B．segregate
C．aggregate
D．propagate
<上一题 目录 下一题>
热门 试题

单项选择题
Cold-blooded means that the core temperature remains close to the ______ temperature as it rises and falls.
A．amicable
B．amiable
C．ambient
D．ambitious
单项选择题
Another common ______ about older people is that they are too old to learn new skills.
A．formalities
B．stereotype
C．convention
D．ideal
相关试题