弹性联轴器的弹性圈具有补偿偏移，缓和冲击作用。

There was a pilot and four people in a small plane. Suddenly there was something wrong with the machine while it was flying in the air. The smoke was everywhere in the plane. The pilot told the people there were only four parachutes(降落伞). They all became worried and started to make excuses(借口).

“I must go and mend the machine,” said the pilot, taking one of the parachutes. There was nothing he could do，so he jumped out.

The first person stood up. “I’m a doctor”, he said. “I help people live longer and I save lives.” He also took a parachute and jumped out.

The next person said, “I must have a parachute. I am a very clever person. I have to go to an important sport match. I know I’ll win the game because I’ll be the cleverest person there.” He picked up a pack and jumped out.

Two men were left---an old businessman and a young mountain climber. By this time the plane was going down fast. The businessman said, “Young man, I am old but you’re still young. You take the last parachute.” The young mountain climber smiled. “Don’t worry,” he said, “We can both jump to safety because there are still two parachutes. Just now the clever person jumped out with my back pack.”

小题1:All the people became worried because ___.

A. they couldn’t find the parachutes

B. they saw the pilot jump out first

C. something was wrong with the plane and one of them might die

小题2:The clever man jumped out with ___.

A. a parachute         

B. nothing   

C. the pack of the climber’s

小题3:All the people thought of themselves except ____.

A. the businessman      

B. the clever man   

C. the doctor      

小题4:From the story we know ___ would be dead.

A. the clever man         

B. the businessman     

C. the pilot

小题5:____ was a kind-hearted man.

A.The pilot 

B. The doctor.

C.The businessman.

总行版手机银行（K/B模式）客户进行“收款账户增加”交易时，如客户收款方账户达到10个，系统会提示（）。

A、增加成功

B、只支持10个收款账户

C、增加失败，请核对后再增加

D、增加失败，请删除现有注册账户后重新增加

计算与分解因式：

（1）计算：（x-2）（x+2）-（x-1）²

（2）因式分a（x-y）-b（y-x）+c（x-y）

设置沉降缝和伸缩缝时应遵守哪些技术要求？

附子的化学成分主要为（）

A.间苯三酚衍生物

B.三萜皂苷类

C.蒽醌类

D.生物碱类

E.香豆素类