[单项选择]管理人员采用自动化、电子化的一些先进手段对执行现场进行控制属于（）
A. 间接控制
B. 电子控制
C. 直接控制
D. 兼顾型控制

American society is not nap-friendly (喜欢午睡). "In fact", says David Dinges, a sleep specialist in U.S.A. "There’s even a prohibition (禁止) against admitting we need sleep. Nobody wants to be caught napping or found asleep at work."
Wrong. The way not to fall asleep at work is to take naps when you need them. "We have to totally change our attitude toward napping," says Dr. William Dement of Stanford University, the godfather of sleep research. At present, experts and researchers are becoming more and more concerned about the dangers of sleepiness (睡眠不足): people causing industrial accidents or falling asleep while driving. This may be why we have a new sleep policy in the White House. According to recent reports, president Bush is trying to take a half-hour nap every afternoon.
About 60 percent of American adults nap when given the opportunity. Actually, sleeping 15 minutes to two hours in the early afternoon can reduce str
A. Industrial development will be slow.
B. Traffic accidents.
C. People will get fired from work.
D. Heart disease.