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单项选择题

下述有关电气间布置的要求中，错误的是( )。

A.应靠近负荷中心和变配电所，以减少线路长度
B.应尽量与其他管井合用，以降低投资
C.应远离烟道，热力管道等设施
D.应尽量避免与楼梯间和电梯井等用同一竖井

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单项选择题

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 Internet would prove socially healthier than television, since the Net allows users to choose their information and to communicate with others.
The fact that Internet use reduces time available for family and friends may account for the drop in psychological health, researchers hypothesized（推测）.Faceless, bodiless “virtual”（虚的）communication may be less psychologically satisfying than actual conversation, and the relationships formed through it may be shallower. Another possibility is that exposure to the wider world through the Net makes users less satisfied with their lives.
“But it's important to remember this is not about the technology, it's about how it is used,” says psychologist Christine Riley of Intel, one of the study's sponsors（发起人）. “It really points to the need for considering social factors in terms of how you design applications and services for technology.”
What had the researchers expected before the research?（　　

A.TheInternetmayaccountforthedropinpsychologicalhealth
B.Internetusemayimprovesocialhealth
C.Internetusehasnothingtodowithsocialhealth
D.SpendingmuchtimeontheInternetmakespeoplefeelbadandlonely

单项选择题

砖基础要设大放脚，如果工程荷载和地基条件相同，试问下列哪种基础构造既安全又经济？( )

未知题型

假设你是丽娜，光明中学的学生，你给你的好友小华写信讲述你的美国之行。内容包括：先去了纽约，看到许多摩天大楼，但看不到世贸大厦了；两天后去了洛杉矶（Los Angeles），参观了好莱坞，游了迪斯尼乐园；还去了内华达（Nevada）的里诺（Reno），游了风景优美的大沪（Dahu）湖。
注意：
1.不要逐字翻译，叙述要连贯；
2.写信人的地址可自编；
3.词数为100左右。

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