[单项选择]Satellite communications are so up-to-date that even when ________ in the middle of the Pacific, businessmen can contact their offices as if they were next door.
A. gliding
B. cruising
C. piloting
D. patrolling

[单项选择]Satellite communications are so up-to-date that even when ________ in the middle of the Pacific, businessmen can contact their offices as if they were next door.
A. gliding
B. cruising
C. piloting
D. patrolling

[单项选择]

The new global satellite communications systems will offer three kinds of service, which may overlap in many different kinds of receivers.
VOICE. Satellite telephones will be able to make calls from anywhere on the earth to anywhere else. That could make them especially useful to remote, third world villages (some of which already use stationary satellite telephones), explorers and disaster-relief teams. Today’s mobile telephones depend on earth-bound transmitters, whose technical standards vary from country to country. So business travelers cannot use their mobile phones on international trips Satellite telephones would make that possible.
MESSAGING. Satellite massagers have the same global coverage as satellite telephones, but carry text alone, which could be useful for those with laptop computers. Equipped with a small screen like today’s papers, satellite messages will also receive short messages.
TRACKING. Voice and messaging systems will
A. They are widely used.
B. They are very helpful.
C. They are costly.
D. Both A andB.

[名词解释]EV值

[单项选择]

Convergence of satellite and terrestrial telephony is certain to deepen as the technical hurdles of multi-standard handset development and infrastructure integration fall.（）

A. initiatives
B. obstacles
C. warnings
D. orders

[单项选择]The development of modem communications technology in developing countries may ______.
A. hinder their industrial production
B. cause them to lose control of their trade
C. force them to reduce their share of exports
D. cost them their economic independence

[单项选择]The development of modern communications technology in developing countries may ______.
A. force them to reduce their share of exports
B. cost them their economic independence
C. hinder their industrial production
D. cause them to lose control of their trade

[单项选择]Communications technology factors that can affect the project include all of the following EXCEPT______．
A. the length of the project
B. the availability of technology
C. executive requirements
D. the urgency of the need for information

[单项选择]The rapid development of communications technology is transforming the ________ in which people communicate across time and space.
A. route
B. transmission
C. vision
D. manner

[单项选择]The observation of weather conditions by satellites is advantageous be cause it ______.


A. uses electronic instruments
B. enables man to alter the weather
C. makes weather prediction easier
D. gives the scientist information not obtained readily otherwise