A-A+
According to the passage how often does REM s
问题详情
According to the passage, how often does REM sleep occur in one night？
A．Once
B．Twice
C．Four or five times
D．Forty times请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析：根据文中第一段第二行的提示，可知REM一晚上发生四到五次。
考点：
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