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【判断题】
The time required to examine the packet’s header and determine where to direct the packet is part of the transmission delay.A.
正确
B.
错误
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【简答题】Man-made satellites have been sent up into space by many countries. These satellites go round the earth and help us to learn more about the earth, the weather and other things. Most countries use thes...
【单选题】关于VIN码LSVHJ133022221761表述正确的是( )。
A.
.上海大众汽车，2012年生产
B.
一汽大众汽车，2012年生产
C.
上海大众汽车，2002年生产
【单选题】在Compendex数据库中，叙词Satellites和相关词语的关系如下： Used for：Artificial satellites； Broader Terms：Spacecraft； Narrower Terms：Communication satellites，Geodetic satellites。 其中不可用于检索的词是( )。
A.
Artificial satellites
B.
Geodetic satellites
C.
Spacecraft
D.
Communication satellites
【简答题】完形填空。 Man has invented four kinds of satellites. The first kind of satellites studies the 1 of the earth. They are used to make maps. They also help countries to see where they can 2 oil or gold. The ...
【单选题】关于VIN码LSVHJ133022221761表述正确的是( )。
A.
上海大众汽车，2002年生产
B.
一汽大众汽车，2012年生产
C.
上海大众汽车，2012年生产
【简答题】The rockets take astronauts and man-made satellites into space. The satellites are used for communication, weather monitoring and research. But how do satellites stay up without falling down? There ar...
【单选题】Compared with the geostationary orbit satellites, LEO will require . 【 】
A.
less complex satellites and more complex user terminals
B.
more complex satellites and simpler user terminals
C.
the same satellites and simpler user terminals as well
D.
less complex satellites and simpler user terminals
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