Evolving from the electric telegraph invented in the 19th century, our communications technology has made great achievements. We have now 1)____ from 1G to 5G. China's 5G technology is currently leading the world. With fast and stable 2)____, 5G can be applied in various scenarios. The BeiDou Navigation Satellite System is one of the four Global Navigation Satellite System providers. It is independently constructed and 3)____ by China and can be integrated with 5G to serve several fields. Transmitting signals via satellites, BeiDou makes it possible for us to send and receive messages in sparsely 4)____ areas. So it can satisfy the demand for emergency communication and search and 5)____ work. Thus, the application of information and communications technology not only changes people's lifestyles, but also turns out to be life-saving.

[单选题]Wordsworth was one of the greatest poets_____lived in the 19th century.A.th

Yet much had happened between. As was discussed before, it was not until the 19t

[单选题]The growth of specialisation in the 19th century might be more clearly seen in scien -ces such as _______ .A． sociology and chemistryB． physics and psychologyC． sociology and psychologyD． physics and chemistry

In the 19th century，water power was widely utilized ____ （generate） electricit

[单选题]The 19th Winter Games, held in Salt Lake City, ______ an Olympic. tradition which goes back almost 3,000 years.A． is the part ofB． are the part ofC． is part ofD． are part of

stamps, postcards or antiques. In the 18th and 19th centuries, (wealth)

[单选题]Our office has ________ to New York from London.A.removed B.settled C.got D

From _ one, Rebecca has been trying to cause arguments in our office.A. seasonB.

From ______ one, Rebecca has been trying to cause arguments in our office.A. day

The museums exhibition features many ___ artifacts from the 18th century, offeri