The European Commission has said Galileo will _____(10) be used for transportation technology, scientific research, land management and disaster monitoring.
Galileo will provide two _____(11); a standard civilian one and an encrypted (把编码), wide-band signal called the Public Regulated Service (PRS)。 This second signal is _____(12) to endure localized jamming and will be used by police and military services in Europe.
The first Galileo satellite is _____(13) to launch late in 2004. Clocks on board the satellites will be synchronized (同步) through 20 ground sensors (传感器) stations, two command centers and 15 uplink (上传) stations.
Receivers on the ground will use time signals from the satellites to precisely calculate their _____(14)。 A =search and rescue function will also let distress signals be _____(15) through the constellation of satellites.
1 A set B represent C offer D indicate
2 A cooperate B install C prevent D protect
3 A off B with C in D up
4 A broadcast B launch C put D use
5 A ability B service C system D channel
6 A open B likely C different D precise
7 A getting B considering C orbiting D improving
8 A to B in C along D beside
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