局域网交换机具有很多特点。下面关于局域网交换机的论述中,______说法是不正确的。
A. 低传输延迟
B. 高传输带宽
C. 可以根据用户级别设置访问权限
D. 允许不同传输速率的网卡共存于同一个网络
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W: What a nice city it was ten years ago. The air was clear, and the water was clean.M: Yes. Now there are too many cars and factories. What do we know about the city now()
A. It was seriously polluted.
B. There are few cars and factories.
C. The air is very clear.
D. It remains what it was ten years ago.
Israeli paintingsIsraeli artist Menashe Kadishman will hold a solo (个人的) show entitled "Flock of Sheep" from November 26 to December 26 at the China National Art Museum.On show are 550 colourful oil paintings of sheep heads.His works have been displayed (陈列) in many important galleries (美术馆), over the past 30 years. They may be seen in the metropolitan Museum in New York, and Tate Gallery in London.Time: 9 a. m. -4 p. m. November 26-December 26.Place: China National Art Museum, I Wusi Dajie, Dongcheng District, Beijing.Tel: 6401-2252Folk concertThe Central Conservatory of Music (音乐学院) will hold a folk concert to commemorate (纪念) the late musician Sum Huacheng.On the programme are many popular folks such as "Moon Night on the Bamboo Tower", "Celebrating Harvest", "Deep and Lasting Friendship", "Golden Snake Dances Wildly", and "Children’s Holiday".Time: 7:30 pm, November 25Place: Beijing Concert Hall, 1 Beixinhuajie.Tel: 6605-5812 If your child is very fond of dancing, you may take your child to()
A. China National Art Museum
Beizhan Theatre
C. Beijing Concert Hall
D. 1 Wusi Dajie
定义企业过程的三类主要资源是产品/服务资源、计划和控制资源和______。
A …………………… Networked computer stations; dial-in access B …………………… Campus-wide area network C …………………… Computers and a laser printer in each classroom D …………………… Private directories for all students and staff E …………………… Mail for staff and students F …………………… Interactive distance learning stations G …………………… Instructional media center H …………………… Student stations I …………………… Resources accessible campus-wide via fiber optic network J …………………… On-line research services K …………………… Student-run stereo radio station L …………………… Telephone in every classroom M …………………… Voice mail for all staff N …………………… Electronic Bulletin Board available around the clock O …………………… T-Internet Access ( )教室配备电脑和打印机 ( )在线科研服务