单项选择题

In the passage, "cohorts" (in the first line of the 4th paragraph) refer to ______.

A．the toys the miniprofessor used
B．the babies taking part in the research
C．the researchers conducting the study
D．the teachers at the day-care center

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热门试题

单项选择题

The experiment described in the passage shows that ______.

A．an infant prodigy performs much better than ordinary kids
B．developmental psychology is an interesting subject
C．babies can learn intricate tricks so long as they are trained
D．toys are important tools to teach science with

单项选择题

The main difficulty the police have in combating terrorist groups is ______.

A．their poor equipment
B．the insufficiency of budget
C．their obsolete way of command
D．the transnational nature of the new terrorism