2. 外语
  3. Sleep problems can seriously affect one’s quality of life. "Sleep fragmentation" refers to a marked lack of "REM" sleep.

Sleep problems can seriously affect one’s quality of life. "Sleep fragmentation" refers to a marked lack of "REM" sleep.

admin2009-05-21  49
问题 Sleep problems can seriously affect one’s quality of life.
"Sleep fragmentation" refers to a marked lack of "REM" sleep.
选项 A、Right
B、Wrong
C、Not mentioned
答案B
解析 短文的第四段对sleep fragmentation进行了解释，它与REM sleep无关，指的是夜间经常醒来。
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