Roman soldiers in some places built long rows of signal towers. When they had a message to send, the soldiers shouted it from tower to tower. If there were enough towers and enough soldiers with loud voices, important news could be sent quickly over distance.
In Africa, people learned to send messages by beating on a series of large drums (鼓). Each drum was kept within hearing distance of the next one. The drum beats were sent out in a special way that all the drummers understood. Though the messages were simple, they could be sent at great speed for hundreds of miles.
In the eighteenth century, a French engineer found a new way to send short messages. In this way, a person held a flag in each hand and the arms were moved to various positions representing different letters of the alphabet (字母表). It was like spelling out words with flags and arms.
Over a long period of time, people sent messages by all these different ways. However, not until the telephone
A. Telephone was invented by a French engineer.
B. Roman soldiers sent the important message by spelling out the words.
C. African soldiers shouted from tower to tower to pass message.
D. Only by using telephone could people send speech sounds quickly.
Roman soldiers in some places built long rows of signal towers. When they had a message to send, the soldiers shouted it from tower to tower. If there were enough towers and enough soldiers with loud voices, important news could be sent quickly over distance.
In Africa, people learned to send messages by beating on a series of large drums (鼓). Each drum was kept within hearing distance of the next one. The drum beats were sent out in a special way that all the drummers understood. Though the messages were simple, they could be sent at great speed for hundreds of miles.
In the eighteenth century, a French engineer found a new way to send short messages. In this way, a person held a flag in each hand and the arms were moved to various positions representing different letters of the alphabet (字母表). It was like spelling out words with flags and arms.
Over a long period of time, people sent messages by all these different ways. However, not until the telephone
A. fine weather
B. high tower
C. the spelling system
D. arm movements
Long ago, a high tower was built. The
tower was in the town of Pisa in Italy. It was a beautiful bell tower. But soon the tower did something strange. It began to lean to one side. The tower leaned and leaned. After a while, people gave the tower a new name. They called it the Leaning Tower of Pisa. Millions of people visit Pisa every year. They go there just to see the Leaning Tower. Will the tower ever fall No one knows. |
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