题目内容
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[主观题]
The underlined word "subjects"(Line 1, Para. 4) refers to ______.A.the performance tests u
The underlined word "subjects"(Line 1, Para. 4) refers to ______.
A.the performance tests used in the study of sleep deficit
B.special branches of knowledge that are being studied
C.people whose behavior. or reactions are being studied
D.the psychological consequences of sleep deficit
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