单项选择题

All of the following were suggested as being used by sleep researchers except

A．projection.
B．hypnosis.
C．charts.
D．recorders.
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单项选择题
The use of the term subjects in the selection refers to
A．waves.
B．dreams.
C．volunteers.
D．measurements.
单项选择题
This passage states that a person is really asleep only
A．after dreaming has passed.
B．when his EEG reveals no alpha rhythm.
C．when his EEG begins to show an alpha rhythm.
D．after the completion of his alpha rhythm decline.
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