单项选择题
在局域网标准中，(28)与FDDI的MAC帧格式较为相似。(29)介质访问控制方法对最短帧长度有要求，(30)对传输线路最短长度有要求。长10km，16Mbit/s，100个站点的令牌环，每个站点引入1位延迟位，信号传播速度位200m/us，则该环上1位延迟相当于(31)m的电缆，该环有效长为(32)。
- A.CSMA/CD
B．TOKENRING
C．TOKENBUS
D．CSMA
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未知题型
There have been some attempts in the United States, Europe, Australia over the past decades to 【C1】______ governments to pay people for the housework they do. A U.S. organization 【C2】______ the Wages for Housework Campaign argued for many years 【C3】______ housework was boring and degrading because it was 【C4】______ , and that payment would improve the 【C5】______ or women in society overall. More recently they have argued 【C6】______ housewives to be included in the labor 【C7】______ and for unpaid housework to be included in the 【C8】______ of a nation's wealth. They have argued that this would make housework more visible, and could possibly 【C9】______ to greater investment in programs to help women. So far, no government has seriously 【C10】______ paying people for housework. This is not surprising when you consider how difficult it would be to carry 【C11】______ such a scheme. The first problem would be to 【C12】______ how much people would be paid. In 1995 the United Nations 【C13】______ the annual value of women's unpaid work at $11 trillion (万亿) 【C14】______ . An Australian government 【C15】______ in 1991 calculated that if someone was to be 【C16】______ to do all the housework in one home it would be 【C17】______ 400 Australian dollars a week. 【C18】______ , there would be more problems to 【C19】______ . Would everyone get the same amount? Which tasks would and would not be paid for? How would the government know 【C20】______ the work was done?【C1】A．callB．encourageC．appealD．make
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未知题型
听力原文：W：Where can I find a map of the university campus? I want to find a place．M：Have you tried the information center? I think they have，if not，they also can provide you with information on how you could get one.Q：What does the man imply about the information center?(17)A．It is in the center of the campus.B．It should have a map of the city.C．It has information about summer camps.D．It probably has a campus map.
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A.（1）－（2）－（6）－（5）－（3）－（4）
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