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【单选题】
Integrating All Communications 1.Have you ever felt frustrated when you have to contact your friends, but cannot reach them even you've tried to call to their mobile phones, pager and telephone? You may have to try again and again to reach them through other means such as the Internet or ICQ chat lines until you find where they are. 2.But never fear, the future will bring this running around to an end, an executive with Lucent Technologies says. 3.'If you contact your friend through a traditional telephone, but you find no one there, the network will automatically search for other communication means until your friend is available and connects you, maybe through his mobile phone or instant message account,' Robert Cohen, Lucent's global product marketing director, said. 4.The integration of different communication networks will make this possible, he said. The integrated telecommunication network is expected to be the next big thing in the next couple of years. 5.Future networks will be developed to be multi-service networks that can support all kinds of communication methods and provide multiple communication services to users. Users would be able to communicate with one another across the different devices with a variety of multimedia contents such as voice, data and video. 6.'It's the next generation network,' Cohen said. 'It's to combine fixed-line telephone, wireless communication, cable as well as the Internet under the same network, and allow communication to be done across different communication technologies.' 7.Adoption of the integrated technologies will help lay the foundation for the 'single number' concept. Instead of having several contact numbers used for several kinds of devices, people will be assigned one number, and this number will be used to allow their friends to contact them through E-mail, mobile phone, pager, instant message or other kinds of devices. 'With just one number your friends will be able to contact you through all communication methods as the number will associate with each individual's communication device connected to the network, 'Cohen said. 8.To usher the industry in the future, Lucent has introduced what is called SoftSwitch technology to be the brain for the 'next generation' network. SoftSwitch allows telecom operators to integrate different kinds of communication networks, even old circuit-based networks or the new 'packet' networks. 9.The technology also allows operators to create enhanced communication services on their existing network infrastructure, helping them to take a shorter time for new service delivery
A.
Functions of Lucent's SoftSwitch
B.
Single number concept-basis for the integrated technologies
C.
Integrated telecommunication network
D.
Single number concept
E.
Higher service quality
F.
Inconvenience of disintegrated communication means Paragraph 1______
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【多选题】胃肠激素的生理作用有:
A.
调节消化腺分泌
B.
调节消化道运动
C.
调节其他激素的释放
D.
促进水盐代谢
E.
促进消化道生长
【简答题】过点 P ( 1,1,1 )且与平面 3x - y + 2z - 1 = 0 平行的平面方程 .
【单选题】求过点A (1,1,1) 和 B (0,1, -1) 且与平面 x + y + z = 0 垂直的平面方程.
A.
x-y+z=1
B.
2x-y-z=0
C.
x-2y+z=0
D.
y+z=2
【单选题】过点( 1 , 1 , 0 )且与平面 3 x -7 y +5 z -12=0 平行的平面方程是
A.
3 x -7 y +5 z +4=0
B.
3 x -7 y +5 z -4=0
C.
3 x -7 y +5 z -12=0
D.
以上都不对
【简答题】求曲面x 2 -y 2 -3z=0的切平面,使切平面过点A(0,0,-1)且与直线 平行.
【单选题】求过点(1; 1; 1) 且与平面 x - y + z = 7 和3x + 2y - 12z + 5 = 0 垂直的平面方程.
A.
2x + 3y -z = 6
B.
2x + 3y + z = 6
C.
2x - 3y + z = 6
D.
2x + 4y + z = 6
【单选题】下列关于分光光度分析的叙述中,错误的是()。
A.
分光光度分析包括紫外光区,可见光区、红外光区三部分的光谱分析
B.
分光光度法的最大优点是可以在一个试样中同时测定两种或两种以上的组分而不需事先进行分离
C.
紫外线吸收主要研究的波长范围是紫外光区域,其波段范围是200~1100nm
D.
分光光度法可以任意选择某种波长的单色光,可以利用各种组分吸光度的加和性,在指定条件下进行混合物中各自含量测定
【单选题】智力的构成要素不包括下列哪一项
A.
性格
B.
注意力
C.
记忆力
D.
思维力
【简答题】过点 P ( 1,2,1 )且同时与平面 x + y - 2z + 1 = 0 和 2x - y + z = 0 垂直的平面方程 .
【单选题】过点(1,2,3)且与平面 x - 3y + z + 1 = 0 平行的平面方程为( ).
A.
(x + 1) - 3(y + 2) + (z + 3) + 1 = 0
B.
(x - 1) - 3(y - 2) + (z - 3) + 1 = 0
C.
(x + 1) - 3(y + 2) + (z + 3) = 0
D.
(x - 1) - 3(y - 2) + (z - 3) = 0
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