| Interact use appears to cause a drop in
psychological health, according to research at Carnegie Mellon
University. Even people who spent just a few hours a week on the Internet experienced more bad feelings and loneliness than those who was online less frequently, the two-year study showed. Researchers are puzzling over the results, which were completely contrary to their expectations. They expected that the Net would prove socially healthier than television, since the Net A. The Net allows users to choose their information and to communicate with others. B. Internet communication may be less psychologically satisfying than actual conversation. C. Undeveloped Internet technology causes the drop in psychological health. D. The wider world through the Net makes users less satisfied with their lives. [多项选择]下列对频率降低对发电机的影响说法正确的是（）。
A. 频率降低还可能引起汽轮机断叶片； B. 频率降低引起转子的转速降低，使两端风扇鼓进的风量降低，其后果是使发电机的冷却条件变坏，各部分的温度升高； C. 若频率降低，必须增大磁通才能保持电动势不变； D. 频率降低对发电机的不会造成影响。 [判断题]使⽤梯⼦时要有⼈扶持和采取防滑措施。
A.正确 B.错误 [单选题]雷雨天气时（）开展接地极检修
A. A.可以 B.B.不可以 C.C.不得 D.D.不该 [不定项选择题]共用题干
More Than 8 Hours Sleep Too Much of a Good Thing
1 .Although the dangers of too little sleep are widely known,new research suggests that people who sleep too much may also suffer the consequences. 2 .Investigators at the University of California in San Diego found that people who clock up 9 or 10 hours each weeknight appear to have more trouble falling and staying asleep,as well as a number of other sleep problems,than people who sleep 8 hours a night.People who slept only 7 hours each night also said they had more trouble falling asleep and feeling refreshed after a night's sleep than 8-hour sleepers. 3 .These findings,which DL Daniel Kripke reported in the journal Psychosomatic Medicine,demonstrate that people who want to get a good night's rest may not need to set aside. More than 8 hours a night.He added that“it might be a good idea” for people who sleep more than 8 hours each night to consider reducing the amount of time they spend in bed,but cautioned that more research is needed to confirm this. 4 .Previous studies have shown the potential dangers of chronic shortages of sleep一for instance,one report demonstrated that people who habitually sleep less than 7 hours each night have a higher risk of dying within a fixed period than people who sleep more. 5 .For the current report,Kripke reviewed the responses of 1,004 adults to sleep questionnaires,in which participants indicated how much they slept during the week and whether they experienced any sleep problems.Sleep problems included waking in the middle of the night,arising early in the morning and being unable to fall back to sleep,and having fatigue interfere with day-to-day functioning. 6 .Kripke found that people who slept between 9 and 10 hours each night were more likely to report experiencing each sleep problem than people who slept 8 hours.In an interview, Kripke noted that long sleepers may struggle to get rest at night simply because they spend too much time in bed.As evidence,he added that one way to help insomnia is to spend less time in bed.“It stands to reason that if a person spends too long a time in bed,then they'll spend a higher percentage of time awake.”he said. Paragraph 6______ A.Kripke's Research B.Dangers of Habitual Shortages of Sleep C.Criticism on Kripke's Report D.A way of Overcoming Insomnia E.Sleep Problems of Long and Short Sleepers F.Classification of Sleep Problems [单选题]行政机关主持,以国家政策为法律依据,以自愿为原则,通过说服教育,促使双方当事人友好协商,互谅互让,达成协议,消除争议纠纷的诉讼外和解活动,称为（）。
A.行政仲裁 B.行政裁决 C.行政调解 D.行政和解 [单项选择]喷灌和滴灌技术具有可比性，这是基于比较分析法的哪个可比性原则（）
A. 技术功能的可比性 B. 资源的可比性 C. 劳动对象的可比性 D. 空间的可比性 [单选题] 第五套人民币 100 元背面人民大会堂顶灯图案具有()特征。
A.无色荧光; B.有色荧光; C.磁性机读; D.高触感。 [单项选择]监理在收到设计变更单后，多少个工作日内完成处理并上报无线室？（）
A. 1 B. 2 C. 3 D. 5 我来回答: 提交
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