男性，54岁，进行性吞咽困难半年，持续胸背痛1个月，入院时明显消瘦，食管钡餐造影提示

在Windows XP操作系统中，用户利用“磁盘管理”程序可以对磁盘进行初始化、创建卷，（）。通常将“C：\Windows\nyprogram.exe”文件设置成只读和隐藏属性，以便控制用户对该文件的访问，这一级安全管理称之为（）安全管理。

通常将“C：\Windows\nyprogram.exe”文件设置成只读和隐藏属性，以便控制用户对该文件的访问，这一级安全管理称之为（）安全管理。

A．文件级

B．目录级

C．用户级

D．系统级

Many years ago, when I was fresh out of school and working in Denver, I was driving to my parents’ home in Missouri for Christmas. I stopped at a gas station(加油站) about 50 miles from Oklahoma City, where I was planning to stop and visit a friend. While I was standing in line at the cash register(收款台), I said hello to an older couple（夫妇）who were also paying for gas.

I took off, but had gone only a few miles when black smoke poured from the back of my car, I stopped and wondered what I should do. A car pulled up behind me. It was the couple I had spoken to at the gas station. They said they would take me to my friend’s. We chatted on the way into the city, and when I got out of the car, the husband gave me his business card.

I wrote him and his wife a thank-you note for helping me. Soon afterward, I received a Christmas present from them. Their note that came with it said that helping me had made their holidays wonderful.

Years later, I drove to a meeting in a nearby town in the morning. In late afternoon I returned to my car and found that I’d left the lights on all day, and the battery（电池） was dead. Then I noticed that the Friendly Ford dealership - a shop selling cars - was right next door. I walked over and found two salesmen in the showroom.

"Just how friendly is Friendly Ford?" I asked and told them my trouble. They quickly drove a pickup truck (小货车) to my car and started it. They would accept no payment, so when I got home, I wrote them a note to say thanks. I received a letter back from one of the salesmen. No one had ever taken the time to write him and say thank you, and it meant a lot, he said.

"Thank you" - two powerful words. They’re easy to say and mean so much.

小题1: The writer planned to stop at Oklahoma City ______.

A．to visit a friend

B．to see his parents

C．to pay at the cash register

D．to have more gas for his car小题2:The words "took off" underlined in Paragraph 2 mean“______”．

A．turned off

B．moved off

C．put up

D．set up小题3:What happened when the writer found smoke coming out of his car?

A．He had it pulled back to the gas station.

B．The couple sent him a business card.

C．The couple offered to help him.

D．He called his friend for help.小题4:The battery of the writer’s car was dead because ______.

A．something went wrong with the lights

B．the meeting lasted a whole day

C．he forgot to turn off the lights

D．he drove too long a distance小题5:By telling his own stories, the writer tries to show ______.

A．how to write a thank-you letter

B．how to deal with（处理）car problems

C．the kind-heartedness of older people

D．the importance of expressing thanks

已知：f（x）=log_ax（0＜a＜1）．若数列{a_n} 使得2，f（a₁），f（a₂），…，f（a_n），2n+4（n∈N^*）成等差数列．

（1）求数列{a_n}的通项；

（2）设b_n=a_nf（a_n），若{b_n}的前n项和为S_n，求S_n．

制动瓦与制动轮之间的摩擦系数，是随着温度的升高而降低的，当温度升到200℃左右时，摩擦系数大约只是原来的（），制动力矩也随之降低。

A、10％

B、15％

C、25％

D、50％

在各工种岗位职责中要求维修技术员做到三干净，即（）、工作场所干净、维修后的现场干净。