下列四组数依次为二进制、八进制和十六进制，符合要求的是（）。 A.11，78，19

缺词填空

     Steve Jobs (乔布斯) died last month at the age of 56, after fighting against cancer(癌症). Millions of

people around the world felt sad. He was a businessman, but he was the "Michael Jackson" of

businessman. His Apple products(产品) were like songs that touched people's hearts and c__1__ their

lives.

     Jobs was not an inventor, but he made Apple products have great style and easy for people to use.

Apple products s__2__cool! The iMac, iPod, iPhone and iPad were always the coolest products on the

market.

     Steve Jobs was also a good e__3__ of "The American Dream". He grew up in a working class

family in California. He didn't have a good e__4__. Instead, he left the college early and started Apple in

his home. But his success was soon f__5__ by bad news.

     Jobs was s__6__ working as CEO of the company in 1985, but that setback(挫折) did not stop him.

Jobs b__7__ a new computer company and also started Pixar.It produced the films Toy Story and

Finding Nemo. Later, Jobs was brought back to s__8__  Apple-and he did it!

     Jobs is a great role model for young people. He had a dream and he took chances (even foolish

chances) to realize that dream. He suffered (遭受)setbacks in business and in his h__9__, but nothing

could stop him m__10__ his dream come true. In the end, he left some words for the young: "Stay

hungry, stay foolish!"

1.______ 2.______ 3.______ 4.______ 5.______

6.______ 7.______ 8.______ 9.______ 10.______

（文科）设命题P：函数f（x）=lg（ax²-ax+1）的定义域为R；命题q：不等式3^x-9^x＜a-1对一切正实数均成立．

（1）如果P是真命题，求实数a的取值范围；

（2）如果命题p且q为真命题，求实数a的取值范围．

对于两个分运动的合运动，下列说法正确的是[ ]

A．合运动的速度一定大于两个分运动的速度    

B．合运动的速度一定大于一个分运动的速度    

C．合运动的方向就是物体的实际运动方向    

D．已知两个分速度的大小就可以确定合速度的大小

下列关于数据库数据模型的说法中，哪一个是不正确的

A．任何一张二维表都表示一个关系

B．层次模型的数据结构是有向树结构

C．在网状模型中，一个子结点可以有多个父结点

D．在面向对象模型中每一个对象都有一个惟一的标识

一、阅读以下文字，回答下面5个小题。

　　日本京都大学教授尾池和夫通过长期观测发现，强烈地震发生前， 自然界产生的异常超无线电波可以用来预报强烈地震。

　　尾池教授从1983年开始在京都府宇治市的家中安装了用来观测自然界超长电波的特殊天线和收音机，观测并比较了大地震发生前产生超长无线电波的次数变化。尾波认为，在地震发生之前，地球岩块内产生许多龟裂，带电粒子释放到空气中，因此产生超长电波。

　　尾波在观测中发现，最近一个时期， 日本附近没有较大的地震，超长波的产生通常每天不少于 500次。但是，从1994年10月4日日本北海道东方海域发生里氏8.1级强烈地震的几天之前开始，从4日晚10时22分发生地震为止，超长波产生的次数最多时一天近3000次。1993年7月北海道西南海域发生强烈地震时，也观测到了同样的超长电波异常现象。

以上文字支持的主要观点是（）

A．日本的地震发生情况

B．地震发生是由于岩块龟裂，产生超长电波

C．日本科学家发现地震前有异常的超长电波

D．日本科学家在家中也能预测地震