氢以（）状态存在于钢中。A．化合物 B．原子或离子 C．氢化物

下列有关存货的会计处理方法中，正确的有（）。

A.存货购买价款指购货价格扣除现金折扣以后的金额

B.存货的加工成本指加工过程中实际发生的人工成本和按照一定方法分配的制造费用

C.期末对存货进行计量时，无需区分有合同价格约定的和没有合同价格约定的存货，应将存货总成本和总可变现净值进行比较，确定是否需计提存货跌价准备

D.通过提供劳务取得的存货，其成本按从事劳务提供人员的直接人工和其他直接费用以及可归属于该存货的间接费用确定

阅读理解。

    The most frightening words in the English language are, "Our computer is down." You hear it more and

more when you are on business. The other day I was at the airport waiting for a ticket to Washington and

the girl in the ticket office said, "I'm sorry, I can't sell you a ticket.Our computer is down."

     "If your computer is down, just write me out a ticket."

     "I can't write you out a ticket. The computer is the only one allowed to do so."

     I looked down on the computer and every passenger was just standing there drinking coffee and staring

at the black screen. Then I asked her, "What do all you people do?"

     "We give the computer the information about your trip, and then it tells us whether you can fly with us

or not."

      "So when it goes down, you go down with it."

      "That's good, sir."

      "How long will the computer be down?" I wanted to know.

      "I have no idea. Sometimes it's down for 10 minutes, sometimes for two hours. There's no way we can

find out without asking the computer, and since it's down it won't answer us."

      After the girl told me they had no backup (备用) computer, I said. "Let's forget the computer. What

about your planes? They're still flying, aren't they?"

      "I couldn't tell without asking the computer." 

      "Maybe I could just go to the gate and ask the pilot if he's flying to Washington," I suggested.

      "I wouldn't know what gate to send you to.Even if the pilot was going to Washington, he couldn't take

you if you didn't have a ticket."

      "Is there any other airline flying to Washington within the next few hours?"

      "I wouldn't know," she said, pointing at the dark screen. "Only it knows. It can't tell me."

      By this time there were quite a few people standing in lines. The word soon spread to other travelers that

the computer was down. Some people went white, some people started to cry and still others kicked their

luggage.

1. The best title for the article is _____. [ ]

A. When the Computer Is Down

B. The Most Frightening Words

C. The Computer of the Airport

D. Asking the Computer

2. What could the girl in the ticket office do for the passengers without asking the computer? [ ]

A. She could sell a ticket.

B. She could write out a ticket.

C. She could answer the passengers' questions.

D. She could do nothing.

3. Why do you think they had not a backup computer?[ ]

A. Because it was easy down

B. Because it was very expensive.

C. Because it was not advanced enough.

D. Because it was not as big as the main computer.

4. The last paragraph suggests that _____. [ ]

A. a modern computer won't be down.

B. computers can take the place of humans

C. sometimes a computer may bring suffering to people

D. there will be great changes in computers

在数据库中，与查询有关的是 (1) ：与规范化方法有关的是 (2) ：与完整性有关的是 (3) ；与安全性有关的是 (4) ；与并发性有关的是 (5) 。

A．非过程化
B．过程化
C．数据压缩
D．断言

驾驶（）在路段上横过机动车道，应当下车推行。

A、自行车

B、电动自行车

C、轻便摩托车

D、三轮车

“脊椎前伸”伸展脊椎和（），促进脊椎的灵活性发展。