问题
单项选择题
下列流中哪一个使用了缓冲区技术( )
A．BufferedOutputStream
B．FileInputSream
C．DataOutputStream
D．FileReader
答案
参考答案：A
解析： BufferedOutputStream使用内部缓冲区，减少了程序对磁盘或者网络等外设的访问次数，从而提高了输出流的性能。
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下列流中哪一个使用了缓冲区技术( )
A．BufferedOutputStream
B．FileInputSream
C．DataOutputStream
D．FileReader
参考答案：A
解析： BufferedOutputStream使用内部缓冲区，减少了程序对磁盘或者网络等外设的访问次数，从而提高了输出流的性能。
Tom and Fred were talking about the year 2050. “What will 36 be like in the year 2050?” asked Tom. “I don’t know,” said Fred. “What do you think?” “Well, no one knows. But it is __37__ to guess,” said Tom. “In the year 2050 everybody will carry a pocket (袖珍) __38___. The computer will give people the __39__ to all their problems. We shall all have telephones in our pockets,__40___ . And we’ll be able to talk to our friends all over the world. Perhaps(也许) we’ll be able to ___41__ them at the same time. Machines will do ___42___of the work, and people will have more__43___. Perhaps they will work only two or three days a week. They will be able to fly to the moon by spaceship and spend their holidays there.” “I’m very _44__to hear that. I hope to fly to the moon. And I hope I’ll be able to live _45___,” said Fred. “Won’t that be interesting? Just like a fish.”
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