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问题 问答题 简答题

我国“银河一3”巨型计算机运算速度达到多少次？

答案

参考答案：1996年6月20日。银河一3巨型计算机诞生，其运算速度每秒130亿次。

单项选择题

Welcome to the Grand Center--the place for all the family


If you like sports, go to the sports center on the twenty-eighth floor. On the twenty-eighth floor, we have a ping-pong room. If you like films, go to the twenty--seventh floor and watch a film in the ABC Cinema.
If you like to eat, there are a lot of places in the Grand Center for you to go to. You can try Wonderful Restaurant. That’s a new restaurant on the twenty-first floor. Crazy Town ( a Sichuan restaurant)is on the twenty-third floor and there’s an American restaurant on the twenty-sixth. But don’t worry, children ! If you like other kinds of foreign food, you can go to the coffee shop on the first floor. It’s really great.
If you like to shop, there are the twelfth to the nineteenth floors. On the twelfth floor, for example, there’s AST World for computers and computer games. There’s a big store on the fifteenth floor for radios, TVs and CDs. And the nineteenth floor has sports stores and a supermarket.

Where can you have some food
[A] On the twenty-second floor．
[B] on the twenty-third floor．
[C] On the twenty-fourth floor．

And there’s Rose Hall for all you dance people ( for people over 14 years old). That’s on the top floor, of course. You can dance and sing all night.
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填空题

已知x1、x2是方程x2-3x-5=0的两实数根，则（x1+3）（x2+3）=______．
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