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【简答题】
. Third-generation mobile phones, known as 3G, are the next big step for the telecom(电信) industry. Data speed in 3G networks is much quicker than that in present technology. This means users can have high-speed Internet access(上网) and enjoy video and CD-quality music on their phones. 'Mobile data is not a dream; it's not an option(选择) but a requirement' said Len Lauer, head of a US communications company, Sprint PCS, at a 3G conference in Bangkok earlier this month. With 3G, you can forget about text messages telling you yesterday's news; a 3G phone can receive video news programs, updated(更新) four times a day. Internet access will also be much quicker, making it easier to surf the Web on your phone than on your computer at home. Don't worry about getting lost. 3G phones offer map services so you can find a new restaurant just by pressing a few keys on your handset(手持机). However, the most impressive part of 3G technology is video calling. With live two-way video communication, you can have face-to-face talks with friends and family on your mobile phone. Many European countries have already launched the service. In May 2000 the US Government issued five licenses(许可证) to run 3G wireless services, while the first 3G phones arrived in Italy in March this year. International telecom companies can't wait to sell 3G in China, the world's largest mobile telecommunications market. But they will have to be patient. At the moment, China is busy testing its 3G-based technologies, networks and services. This will be followed by a trial period before the phones can finally hit the shops. “We need to create a pool of 3G customers before the large-scale commercial launch(开始) of the service,” said Fan Yunjun, marketing manager for Beijing Mobile. “We expect that the 3G licenses will be issued(发行) late next year.” We'll also see 3G services enter our daily lives in all-sorts of new ways, from shopping and banking to playing interactive computer games over the net. It won't be long before we think nothing of sitting on a train using a mobile palmtop(掌上型电脑) to check our bank accounts or pay bills. You might even click on an icon(图标) on the screen to set up an immediate video-conference with your bank clerk. 67. 3G is ______. A. a kind of mobile phone that can send text message and make calls B. a kind of technology that makes mobile data and video calling come true C. a kind of player that can be used to listen to CD or MP3 music D. a kind of system that makes it easy to surf the Internet 68. What does Len Lauer want to inform the readers? A. Realizing the dream of mobile data based on the application of 3G is a must. B. There is no need to send messages since 3G can receive video news programs. C. 3G is supposed to own all the functions that a computer has. D. It is a choice to carry mobile data with 3G phones. 69. The 3G services can be launched after the following steps EXCEPT that ________. A. they have to test its 3G-based technologies, networks and services B. they need to create a group of 3G customers C. the 3G licenses are issued and 3G phones are tested D. international telecom companies decide to sell 3G in China 70. The last paragraph shows us that ________. A. 3G services bring a lot of convenience to us B. we cannot live without 3G mobile phones C. 3G services can change our life completely D. 3G services will take the place of other technologies
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【判断题】处理器调度程序在该程序执行过程中要控制其 运行状态
A.
正确
B.
错误
【单选题】在降低定子电压调试过程中,三相异步交流电动机不会( )
A.
减小最大转矩
B.
减小同步转速
C.
减小启动转矩
D.
减小负载能力
【单选题】下列先天性心脏病中出现明显紫绀的是:
A.
心房间隔缺损;
B.
心室间隔缺损;
C.
法乐(Fallot)四联症;
D.
主A狭窄;
E.
肺A狭窄。
【单选题】下列关于鸦片战争后中国国情的说法中,正确的是
A.
地主阶级对农民的剥削虽然依然存在,但是封建制度的根基已经土崩瓦解。
B.
由于西方列强的入侵,由于封建统治的腐败,中国逐渐成为半殖民地半封建社会,既不同于封建社会,又有别于资本主义社会。
C.
中国民族资本主义取得了发展,在社会政治文化生活中起了较大作用,逐渐成为中国社会经济的主要形式。
D.
在诸多的社会矛盾中,占支配地位的主要矛盾是封建主义和人民大众的矛盾、和中华民族的矛盾,其中前者是最主要的矛盾。
【单选题】设A是4×5矩阵,B是5×4矩阵,且AB=E,则r(A)=( )
A.
5 ,
B.
1 ,
C.
4 ,
D.
20
【单选题】处理器调度程序在该程序执行过程中要控制其( )
A.
程序间的同步
B.
程序间的通信
C.
运行状态
D.
运行时间
【单选题】下列先天性心脏病中出现明显紫绀的是( )
A.
心房间隔缺损
B.
心室间隔缺损
C.
法乐(Fallot)四联症
D.
主动脉狭窄
E.
肺动脉狭窄
【简答题】为维护党的章程和其他党内法规,严肃党的纪律,纯洁党的组织,保障党员民主权利,教育党员遵纪守法,维护党的团结统一,保证党的路线、方针、政策、决议和国家法律法规的贯彻执行,根据()制定中国纪律处分条例。
【判断题】The writing of high-level government documents is usually expected to be informal.
A.
正确
B.
错误
【单选题】设A和B分别为4×3的和3×5的矩阵,且AB=O(零矩阵),其中B为非零矩阵,下列结论中一定正确的是
A.
B的列向量均为齐次线性方程组Ax=0的解。
B.
B的行向量均为齐次线性方程组Ax=0的解。
C.
A的秩r(A)=3
D.
A的秩r(A)=1
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