A-A+
According to Dr. David Americans ______.A．are
问题详情
According to Dr. David, Americans ______.
A．are ideally vigorous even under the pressure of life
B．often neglect the consequences of sleep deficit
C．do not know how to relax themselves properly
D．can get by on 6.5 hours of sleep
参考答案
正确答案：B
解析：推理题。根据第二段最后一句，Dr. David指出美国人认为每天睡6.5小时就够了，但事实上他们需要7.5或8小时，甚至更多时间的睡眠才可以使他们感觉精神抖擞。忽略睡眠不足的结果是不能感觉完全的精神抖擞。
