以下关于沉没成本观念何者最有问题？（） A.如“一进入吃到饱餐厅用餐后”之餐费 B.

阅读理解。

     Five Canadian climbers were saved yesterday, after they spent five days high up on K2. K2 is the second

tallest mountain in the world.

     Mount Zhu Mu Lang Ma is the first tallest mountain in Xi Ma La Ya mountains. K2 is in the Xi Ma La Ya

Mountains, too. Mount Zhu Mu Lang Ma is taller, but many climbers feel that K2 is the most dangerous

mountain to climb. The top of K2 mountain is very steep (陡峭的), and the weather change very quickly.

     The Canadian climbers were trapped on the mountain last Tuesday. That morning, the weather was sunny,

but in the afternoon it suddenly started to snow. The snow went on falling for the next three days. The

climbers could only sit in their camps, and hoped that someone could come to save them.

     "It was so cold that evening." said Den, the leader of the team."We had to stay close together to keep

warm. It was teamwork that kept us alive."

      However, Den and his team want to start climbing K2 again soon."We hope to climb K2 again next

summer. We'll keep on trying until we make it."

1. How many climbers were there in the Mountain K2?

A. There were 2.

B. There were 5.

C. There were 3.

D. There were 7.

2. Which mountain is the tallest in the world?

A. It is Mount Zhu Mu Lang Ma.

B. It is Mount K2.

C. It is the Xi Ma La Ya Mountains.

D. It is Mount Canadia.

3. Why is the K2 more dangerous to climb?

A. Because it is taller than Mount Zhu Mu Lang Ma.

B. Because it is snowy all year round.

C. Because the weather change quickly on the top of it.

D. Because there was no way to climb and no food to eat while climbing.

4. What was the weather like on that day when they started to climb?

A. It was snowy.

B. It was fine.

C. It was snowing first but later sunny.

D. It was windy and snowy all the day.

5. How could the climbers stay alive?

A. They ate a lot of food to keep alive.

B. They continued to climb the mountain and never stopped.

C. They helped each other to stay alive.

D. They climbed down the mountain and some saved them.

电子皮带秤秤架应安装在皮带机的（）。

A.头部，拖动滚筒处

B.中间，平直段

C.尾部，下料口前一定距离的平直段

为明确诊断首选的实验室检查是

A．腰穿

B．头颅CT

C．急诊心电图

D．血钾测定

E．脑电图

根据“netstat -s-a”的执行结果，这台主机收到的IP数据包数为 (1) ，收到TCP报文段数为 (2) ，发送TCP报文段数为 (3) ；收到UDP报文段数为 (4) ，发送UDP报文段数为 (5) ，当前TCP连接数为 (6) 。

在计算机的硬件系统中，以下不是输出设备的是

A．HP公司生产的6P型号激光打印机

B．HP公司生产的870C彩色喷墨打印机

C．LG公司的"L1510S"型号15寸液晶显示器

D．LG公司的17寸纯平显示器

E．SONY公司的数码相机