Windows内存管理程序使用了内存分页和32位线性寻址。整个32位地址空间分为匹个

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问题:

Windows内存管理程序使用了内存分页和32位线性寻址。整个32位地址空间分为匹个主要段,其中第三个(从低地址到高地址,即2000MB~3000MB)段的作用是( ),

A.系统保留区

B.由Windows的所有过程使用的共享区

C.私有区保存当前执行WIN32进程的地址空间

D.16位/MS-DOS兼容性区

考点:计算机等级考试PC技术三级PC技术笔试64
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(B)


Tim Richter and his wife, Linda, had taught for over 30 years near Buffalo, New York—he in computers, she in special education. "Teaching means everything to us", Tim would say. In April 1998, he learned he would need a heart operation. It was the kind of news that leads to some serious thinking about life’s purpose.
Not long after the surgery, Tim saw a brochure describing Imagination Library, a program started by Doily Patron’s foundation (基金会) that mailed a book every month to children from birth to age five in the singer’s home town of Sevier, Tennessee. "I thought, maybe Linda and I could do something like this when we retire," Tim recalls. He placed the brochure on his desk, "as a reminder."
Five years later, now retired and with that brochure still on the desk, Tim clicked on imagination library. The program had been opened up to partners who could take advantage of book and postage discounts.
The quality of the books was of great concern to the Richters. Rather than sign up online, they went to Dollywood for a look-see. "We didn’t want to give the children rubbish," says Linda. The books-reviewed each year by teachers, literacy specialists and Dollywood board members-included classics such as Ezra Jack. Keats’s The Snowy Day and newer books like Anna Dewdney’s Llama series.
Satisfied, the couple set up the Richter Family Foundation and got to work. Since 2004, they have shipped more than 12,200 books to preschoolers in their area. Megan Williams, a mother of four, is more than appreciative "This program introduces us to books I’ve never heard of."
The Richters spend about $400 a month sending hooks to 200 children. "Some people sit there and wait to die," says Tim. "Others get as busy as they can in the time they have left.\

What can we learn from Tim’s words in the last paragraph

A. He needs more money to help the children.
B. He wonders why some people are so busy.
C. He tries to save those waiting to die.
D. He considers his efforts worthwhile.

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患者,男,27岁,因脐周疼痛伴恶心8小时入院,1小时前疼痛转移至右下腹。查体:右下腹麦氏点压痛、反跳痛明显。血常规提示白细胞明显增多,腹部X线片未见异常,临床考虑急性阑尾炎。

患者最初脐周疼痛其发生机制属于()

A.内脏性疼痛

B.躯体性疼痛

C.牵涉痛

D.既有躯体性疼痛又有内脏性疼痛

E.既有躯体性疼痛又有牵涉痛

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显微镜的原理是:来自被观察物体的光经过物镜后成一个______像,目镜所成的是______像.

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全晶体照射的TD5/5剂量为()

A.1200cGy

B.1100cGy

C.1000cGy

D.700cGy

E.500cGy

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在获取土地使用权的途径中,土地使用权出让即是土地使用权划拨。

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