C．is less beneficial to humans．
D．is more sensitive to people’s feelings．
26．What would be the best title for the text？
A．AIBO—you new pet
B．AIBO—your future friend
C．Your dog —your exact double
D．Your dog—your best friend forever
27．How does the text mainly develop?
A．By using numbers.
B．By making comparisons
C．By presenting research findings.
D．By following the order of importance.．
C
The year is 971. Ray Tomlinson is sitting in his office in Cambridge, Massachusetts. He types a few letters on a keyboard. Then he moves to a second computer in the room and reads the monitor. He just sent the first electronic message from one computer to a different computer through a network.
What did this first e-mail say? Tomlinson doesn’t remember. Maybe it was just a string(串) of letter, like“q w e r t y u I o p”.He does remember the second message. He sent it to his co-workers.This second e-mail message told people how to send e-mail on the computer network.
Before 1971, people only had keyboards and monitors, which were all connected to a big computer, at their desks. People could only send messages to other people on the same computer. They could send files(文件) to other computers through the network, but they couldn’t “talk”
To solve this problem, Tomlinson needed a way to direct messages to the right person on the right computer on any network. He chose the @symbol to separate a person’s name from the name of the computer the person was using. The @ symbol was a good choice. This symbol was not in anyone’s name. Few people used it. In fact, typewriter companies thought about taking it off the keyboard.