四六级考试

【单选题】 Why is the question of "how easily people can get used to working at night" no mere academic
A．Because few people like to reverse the cycle of sleep and wakefulness.
B．Because sleep normally coincides with the hours of darkness.
C．Because people are required to work at night in some fields of industry.
D．Because shift work in industry requires people to change their sleeping habits.

网考网参考答案：D
网考网解析：
从第二段第一至三行可推出，自动化工业要求机器全天24小时运转，使人们调整自己睡眠，自然变白班为夜班也成了越来越重要现实问题，D项意为“工业中的工作转换需要人们改变自己的睡眠习惯”，故正确答案为D项。 查看试题解析出处>>