问题 填空题

在保护模式下,Windows程序的逻辑地址空间为4GB。为了进行有效地使用和管理,操作系统对它们的区域划分作了统一的规定,其中, 【14】 以下的地址空间为无效的地址,通常用来探测执行程序的存取操作是否出错。

答案

参考答案:16KB

解析: 16KB以下的地址空间(即0—0x00003FFF的逻辑地址)为无效的地址,通常用来探测执行程序的存取操作是否出错。这个地址空间的设置是为了帮助程序掌握NULL指针 (即空指针)的分配情况,避免使用0x00000000地址的内存。

写作题
阅读理解

     Friendship and friends continue to be the centre of our life. The relationship that we share with our

friends is grounded in mutual (相互的) care as our friends help us in shaping our personalities as well.

Even in this age of online social networking and e-cards, the need of keeping the network of friends,

whether online or offline remains a primary concern for people. We may not completely understand

what makes a friend but we all want to have a good number of friends around us.

     The first step to make friends with someone is to make them like you. If they don't like you in the first

place, it is unlikely that they’ll be eager to become your friends. To let someone know that you are

specially interested in them, simple gestures like a little smile and calling them by their names can lay the

basic foundation. To make the other person feel important to you, you need to be a good listener and

encourage the other person to talk. Give your honest and sincere opinion but do not directly criticize or

make fun of him or her.

     The second step of making someone your friend is to develop a mutual understanding. You need to

share his or her experiences and  it is necessary for you to develop a habit to see things from the other

person's point of view.

     The third or final step towards friendship is to show your unconditional support and encouragement

towards your friend. Moreover, you also need to be very clear about your expectations from your friend.

If what you expect from the person you want to make friends with matches with what that person can

give, the developing friendship between you and your friend is sure to be successful.

1. The underlined word "shaping" (in Paragraph 1) means "________".

A. forming      

B. changing        

C. catching        

D. losing

2. In order to develop the friendship, the most important thing is that we should _______.

A. give gifts to each other often        

B. meet each other every day

C. care for each other            

D. help each other to live a happy life

3. Which one of the following is true according to this passage?

A. It is no use learning what a true friend is.

B. It is very important to understand each other.

C. It is a duty for you to meet your friends' need all the time.

D. We had better keep silent when staying with our friends.

4. If you want to make friends with someone, you can ________.

A. show your interest with a smile to him or her

B. make him or her feel more important than you

C. never expect him or her to support you

D. have your own ways of seeing things