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问题 单项选择题

若内存采用固定分区管理方案，在已分配区可能会产生未用空间，通常称之为（）。

A、空闲页面

B、碎片

C、废块

D、空闲簇

答案

参考答案：B

解析：

这是有关存储管理中的概念。内存管理有固定分区、页式分区、段式分区、段页式分区等几种。碎片是固定分区存储空间经过几次分配之后，出现的一些小块存储空间，这些小块存储空间由于太小无法分配给程序使用。

写作题

阅读下面一则材料，根据要求作文。

　　云雀见麻雀整天在树枝上跳来跳去，就问："麻雀太太，你为什么不飞得高一点呢？"

　 麻雀斜着眼睛瞟了它一眼，说："难道我还飞得不高吗？你瞧瞧公鸡！"

　  "公鸡伯伯，你为什么不飞得高一点呢？"

　 公鸡骄傲地在房顶上迈着八字步，反问："难道我还飞得不高吗？你瞧瞧鹌鹑！"

　  "你为什么不能飞得高一点呢？鹌鹑姐姐。"

　 鹌鹑奋力从草尖上飞过去，得意地对云雀说："难道我还飞得不高吗？你瞧瞧癞蛤蟆！"

　　后来，云雀遇见雄鹰，便向雄鹰请教："雄鹰叔叔，你为什么飞得那么高呢？"

　  "不不。"雄鹰谦虚地说，"离蓝天，我还差得远呢！"

　  "啊，我明白了！"云雀眨巴眨巴眼睛想，"谁如果想展翅高飞，就不能把目标定得太低；如果眼睛只盯在树冠以下，那就永远不可能在蓝天白云间翱翔。"

　　这则寓言故事中的麻雀、鹌鹑、雄鹰等对所飞的高度有着不同的认识，你对“高度”又有着怎样的认识呢？请以“高度”为话题，写一篇不少于800字的议论文。立意自定，题目自拟，所写内容必须在话题范围之内。
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单项选择题

Mr. Peter Johnson, aged twenty-three, battled for half an hour to escape from his trapped car yesterday when it landed upside down in three feet of water. Mr. Johnson took the only escape route—through the boot.
Mr. Johnson’s car had finished up in a ditch at Romney Marsin, Kent after skidding on ice and hitting a bank. "Fortunately, the water began to come in only slowly, " Mr. Johnson said. "I couldn’t force the doors because they were jammed against the walls of the ditch and dared not open the windows because I knew water would come flooding in. "
Mr. Johnson, a sweet salesman of Sitting Home, Kent, first tried to attract the attention of other motorists by sounding the horn and hammering on the roof and boot. Then he began his struggle to escape.
Later he said, "It was really a half penny that saved my life. It was the only coin I had in my pocket and I used it to unscrew the back seat to get into the boot. I hammered desperately with a hammer trying to make someone hear, but no help came. "
It took ten minutes to unscrew the seat, and a further five minutes to clear the sweet samples from the boot. Then Mr. Johnson found a wrench and began to work on the boot lock. Fifteen minutes passed by. "It was the only chance I had. Finally it gave, but as soon as I moved the boot lid, the water and mud poured in. I forced the lid down into the mud and scrambled clear as the car filled up. "
His hands and arms cut and bruised, Mr. Johnson got to Beckett Farm nearby, where he was looked after by the farmer’s wife, Mrs. Lucy Bates. Huddled in a blanket, he said, "That thirty minutes seemed like hours. " Only the tips of the car wheels were visible, police said last night. The vehicle had sunk into two feet of mud at the bottom of the ditch.

It may be inferred from the passage that ______.

A. the ditch was along a quiet country road
B. the accident happened on a clear warm day
C. the police helped Mr. Johnson get out of the ditch
D. Mr. Johnson had a tender wife and was well attended
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