路由器冗余是为了保证设备的( )性与( )性。

乙银行若要收回贷款，可不可以依据贷款偿还保证书向保险公司要求承担保险责任，进亏赔付为什么

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         It was 25th December. Marie，a 13-year-old Australian girl，was happy.It was Christmas and

Marie’s mother was making a very special cake.She put four small coins(硬币)into the cake and then

baked it.The four coins were for good luck. After dinner，Marie and her family ate the cake.They found

three coins in the cake and put them on the table. Where was the fourth one？It was missing(找不的)，

but Marie’s mother didn’t notice. After Christmas，Marie got sick. She coughed and couldn’t speak.

Marie's parents took her to hospital. Doctors at the hospital looked her over and then sad，“We are

sorry，but we can’t help her.”For 12 years，Marie didn’t speak. But like other common people，she

grew up，she got a job，she got married. One day，when Marie was 25 years old，she got a sore

throat. She began to cough. She coughed up something small and black. What was it? Marie didn't know.

She took it to a hospital. A doctor at the hospital said，“This is a coin!”The doctor told Marie，“I

think you can speak again.”

1. When did the story begin?

A. During Christmas.

B. On Marie's birthday.

C. Before Christmas

2. How old was Marie when she became unable to speak?

A. She was 12.

B. She was 13.

C. She was 25.

3. Why did Marie go to the hospital 12 years later?

A. Because she had a bad cold and began to cough.    

B.Because she heard the doctor there could help her speak again.    

C.Because she wanted to know what the small and black thing was.

4. Where had the missing coin been?

A. In the cake.    

B. In Marie's throat.

C. On the table.

5.What can you infer(推断)from the passage ?

A. Marie lived an unusual life after she got sick    

B. The coins in the cake brought good luck to Marie.

C.The 13-year-old girl couldn’t speak because of the coin.

病毒性心肌炎中最容易侵犯的病毒是（）

A.麻疹病毒

B.疱疹病毒

C.流感病毒

D.柯萨奇病毒

E.肠道病毒

有关曼彻斯特码编码的正确叙述是（）。

A．每个信号起始边界作为时钟信号有利于同步

B．这种编码机制会带来直流漂移

C．每位的中间跳变会表示信号的取值为零

D．将时钟与数据取值都包含在信号中

脊休克的主要表现是（）

A.血压下降

B.粪尿积聚

C.发汗反射消失

D.断面以下脊髓所支配的骨骼肌痉挛

E.动物失去一切感觉