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
查看答案
"An intelligent mind needs a strong body to make it useful. " means （）
A. if you want to make your strong body Useful, you must have an intelligent mind
B. in order to make your intelligent mind useful you must have a strong body
C. to make your strong mind most useful you need a strong body
D. if you have a strong body you will have a strong mind
Which of the following shows that a person is NOT dreaming in his sleep（）
A. His eyes begin to move.
B. His breathing becomes faster.
C. His heart rate increases.
D. His eyes stop movin
21（）
A. foreign
B. native
C. second
D. official
23（）
A. various
B. similar
C. familiar
D. same
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