填空题

While awake, people can produce ______ waves in their brains.

【参考答案】

alpha or beta
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填空题
A sleeping person and a fainted one are similar in that both can be waken by strong stimulus.
单项选择题
A．flawB．errorC．defectD．fault
A．flaw
B．error
C．defect
D．fault
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