将网络安全策略的配置和调整程序化，属于硬件防火墙的（）安全维护。 A.日志记录 B.

在离接触网带电部分不到（）m的建筑物上作业时，必须按规定办理接触网停电申请手续，得到许可停电施工命令，并有接触网工区派人安设临时接地线后，方能施工。

A、2

B、3

C、4

D、5

一个在明代被选为锦衣卫的人，他必须[ ]

A、是锦衣卫学校的毕业生

B、兼管对臣民的监视、侦查

C、由东厂直接指挥

D、受法律的约束

删除student表的“平均成绩”字段的正确SQL命令是

A．DELETE TABLE student DELETE COLUMN平均成绩

B．ALTER TABLE student DELETE COLUMN平均成绩

C．ALTER TABLE student DROP COLUMN平均成绩

D．DELETE TABLE student DROP COLUMN平均成绩

阅读理解。

     Jeanne Calment, a French woman, became a record breaker on 17 October of 1995, when at the age of

120 years and 238 days, she became the longest-lived human being on record. A Japanese man died in 1986

at the age of 120 years and 237 days.

     Jeanne Calment lives in a small old people's home in the south of France; her husband, her only child and

her grandson have all died. She is nearly blind and deaf and is always in a wheelchair, but her doctor describe

s her as being more like a 90-year-old in good health than someone of 120. She still has a lively sense of humor. When asked on her 120th birthday what she expected of the future, she replied: A very short one. She also

remarked that she thought the good Lord had forgotten all about her.

     So what is the key to a long life? According to some doctors, diet, exercise and no smoking are the three

important factors. Jeanne Calment has followed two of the tips. She has always eaten a healthy diet, and she

used to do exercises every day until she broke her leg at the age of 115. However, until recently she drank two

glasses of strong red wine a day, and she does smoke(now only a little). Besides, Jeanne Calment might have

got very good genes (基因) from her parents. Her father lived to the age of 94 and her mother to 86.

      A local lawyer bought her house when she was 80 under an agreement that he would pay her some money

every year until her death. It must have seemed a good move at the time, but so far the lawyer has paid her at

least three times the value of the house. Every year on her birthday Jeanne Calment sends him a card saying:

Sorry, I'm still alive!

1. How does Jeanne Calment feel about her old age?

A. She is miserable and unhappy.

B. She is cheerful and humorous.

C. She would like to live much longer.

D. She feels she is going to die very soon.

2. Jeanne Calment owes her good health and long life to ______.

A. smoking only a little every day

B. her giving up smoking and drinking

C. drinking two glasses of strong red wine every day

D. the good genes from her parents, a healthy diet and some exercises

3. Why does Jeanne Calment say"Sorry, I'm still alive" to the local lawyer every year on her birthday?

A. Because she had an agreement at 80 with the lawyer which was to her advantage.

B. Because she has asked the lawyer to pay her more rent than they first agreed.

C. Because the lawyer has paid her much more money than the value of the house.

D. Because the house she sold to the lawyer isn't worth the money he has already paid.

（8分）（1）根据平面镜成像的特点，在图中画出物体AB在平面镜MM′中的像A′B′．

（2）从S点发出的两条光线入射到凹透镜上，作出折射光线．

（3）在图中画出茶杯对桌面的压力和桌子对茶杯的支持力的示意图．

（4）如图所示，试画出作用在杠杆A端使杠杆在图示位置平衡的最小动力F的示意图并画出该力的力臂L．