某公司打算利用可移动的无线传感器组成一个Ad hoc式的无线传感器网络,用于野外临时

题型:单项选择题

问题:

某公司打算利用可移动的无线传感器组成一个Ad hoc式的无线传感器网络,用于野外临时性监控,并把监测结果通过Internet传送到公司内部的服务器。适于该网络的路由协议是______,用于该网络与公司通信的最佳方式是______。

A.RIP
B.OSPF
C.AODV
D.BGP-4

考点:计算机软件水平考试高级网络规划设计师网络规划设计师
题型:单项选择题

In 1998 consumers could purchase virtually anything over the Internet. Books, compact discs, and even stocks were (1) from World Wide Websites that seemed to (2) almost daily a few years earlier, some people had predicted that consuners accustomed to shopping in stores would be (3) to buy things that they could not see or touch (4) . For a growing number of time-starved consumers, however, shopping from their home computer was proving to be a convenient (5) to driving to the store.

A research estimated that in 1998 US consumers could purchase $ 7.3 billion of goods over the Internet, double the 1997 total. Finding a bargain was getting easier, (6) the rise of online auctions and Websites that did comparison shopping on the Internet for the best (7) .

For all the consumer interest, (8) in eyberspaee was still a largely (9) business, however. Internet pioneer Amazon. eom, which began selling books in 1995 and later (10) into recorded music and videos, posted (11) of $ 153.7 million in the third quarter, up from $ 37.9 million in the same period of 1997. Overall, (12) , the company’ s loss widened to $ 45.2 million from $9.6 million, and analysts did not expect the company to turn a profit (13) 2001. (14) the great loss, Amazon. tom had a stock market value of many billions, reflecting investors’ (15) about the future of the industry.

Internet retailing appealed (16) investors because it provided an efficient means for reaching millions of consumers without having the cost of operating (17) stores with their armies of salespeople. Selling online carried its own risks, however, (18) so many companies competing tor consumers’ attention, price competition was (19) and profit (20) thin or nonexistent.

12()

A.consequently

B.though

C.however

D.yet

题型:单项选择题

江 * * * * 在党的十五大报告中指出:建立社会保障体系,实行社会统筹和个人帐户相结合的养老、医疗保险制度,完善失业保险和社会救济制度,提供()

A.充分的生活保障

B.最基本的社会保障

C.可靠的生活保障和福利待遇

D.高水平的社会保障

题型:单项选择题

用于电镜检查的标本应选用的固定液是()

A.10%甲醛

B.70%乙醇

C.95%乙醇

D.4%戊二醛

E.Camoy固定液

题型:单项选择题

下列有关空洞的叙述,错误的是()

A.指病灶内较大而无管状形态的透亮影

B.壁厚度<4mm倾向于良性

C.良性空洞多为偏心性厚壁,壁不规则,有壁结节

D.壁厚度>15mm倾向于恶性

E.影像上定义为大于相应支气管径两倍、且与上下层面支气管不连续的灶内透亮影

题型:单项选择题

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