A-A+
It can he concluded from the passage that one
问题详情
It can he concluded from the passage that one should sleep as many hours as necessary to ______.
A．improve one"s memory dramatically
B．be considered dynamic by other people
C．maintain one"s daily schedule
D．feel energetic and perform. adequately
参考答案
正确答案：D
解析：分析推理题。文章一直在分析现代美国人睡眠不足的原因及由此引发的一些问题如精力不充沛、表现不好、记忆力削弱、作出决定的能力和注意力减弱等，通过专家的话与例子，表达出了要读者注意保持睡眠充足的观点。所以保持睡眠充足的目的当然是为了保持充沛的精力、提高日常工作效率等，选 [D] 。也可。由常识判定答案。
