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单项选择题

A．projection.B．hypnosis.C．charts.D．recorders.All of the……

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.

单项选择题Which statement is true

A．A question is important and therefore it is scientific.
B．A question is unscientific and therefore no scientist believes it.
C．A fact is a descriptive statement upon which all qualified observers agree in believing to be accurate.
D．Scientists sometimes study metaphysics.,

单项选择题The word concrete in the second sentence of the passage means

A．general.
B．particular.
C．scientific.
D．verifiable.

单项选择题The central idea of the passage is

A．scientific knowledge is based on verifiable evidence.
B．science does not have answers for verifiable evidence.
C．science has no absolute truths.
D．the scientific method requires that all conclusions be open to reexamination whenever new evidence is found to challenge them.