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[单选题]
8.解决I／O设备与处理机速度不匹配的问题可以采用
A
设置信箱的方法
B
设置端口的方法
C
设置缓冲区的方法
D
设置消息池的方法
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试题答案：
C
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Passage Three When you stretch out in the sun you can do one of the three things: you can use no sun tan oil, an ordinary sun tan oil; or Bergasol. If you don't use any sun tan oil when you're in the sun, you will burn surprisingly quickly. If you use an ordinary sun tan oil, you will protect your skin to a lesser or greater degree.How much protection depends on the "protection-factor number" on the bottle. Some oils block out so many of the sun's rays and you can stay in the sun all day without burning but you won't go very brown,either. Bergasol will protect your skin like an ordinary sun tan oil. It also has a tan accelerator that speeds up the rate at which the sun activates the skin cells that produce melanin(黑色素). It is melanin that gives the skin its brown colour. Bergasol enables you to go brown faster,am as the days pass the difference will become more obvious.Unfortunately, this special formulation isn't Cheap to prepare.So Bergasol is rather more expensive than ordinary sun tan oil. However, the price looks more attractive as you do. Bergasoi It makes you go brown faster Protection Many people imagine that "cover-up" means you don't get a tan. Nothing to show for your holiday. Not so. With "cover-up", you can get brown if you want to. The point of "cover-up" is to protect your skin from the harmful rays of the sun which, according to the experts ,make your skin look older. That's what Solex Cover-up is all about--protection for your skin. It has a Sun Protection Factor 8, which makes it suitable for anyone. Find out how it works for you by consulting the Solex Sun Chart. On sale wherever Solex is. With Solex Cover-up, you can tan as slowly as you like. As gently as you like. And with much less chance of peeling. Your tan will look better. Your skin will stay young longer. Solex Gentle tan.., full protection
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