問題詳情

48. What does the word both in the third paragraph refer to?
(A)Sleep time and sleep efficiency.
(B)At bedtime and three hours before bed.
(C)Three hours and six hours before bedtime.
(D) Caffeine consumptions and sleep perception.

參考答案

答案:A
難度:困難0.328076
統計:A(104),B(43),C(71),D(82),E(0)

內容推薦

內容推薦