问题 单项选择题

B.LCC.FCD.SLONU的注册过程说法错误的是()。A.ONU的执行动作:在上电启动或复位时,ONU进入Discovery状态。等待来自OLT的“DiscoveryGate”消息B.ONU的执行动作:如果所收到的消息类型为Discovery,就对此消息做出应答C.OLT的执行动作:OLT以广播方式周期性的发送Discovery检测帧D.响应ONU的注册请求并分配LLID

A.ONU的执行动作:在上电启动或复位时,ONU进入Discovery状态。等待来自OLT的“DiscoveryGate”消息

B.ONU的执行动作:如果所收到的消息类型为Discovery,就对此消息做出应答

C.OLT的执行动作:OLT以广播方式周期性的发送Discovery检测帧

D.响应ONU的注册请求并分配LLID

答案

参考答案:B

单项选择题
阅读理解

Charlie works in a post office. His father lost his job five years ago and his mother is often ill. And he has two brothers and a sister. He works hard and tries his best to buy enough food for his family.

  Last month his family had to move to an old house outside the city. It's farther from the post office and he has to get up early in the morning in order to catch the 6:30 train. The head of his office is strict and everybody has to get there on time. He knows what it'll mean if he's late. A friend of his had pity on(同情) him and lent his old car to him. The young man was happy and from then on he could go to work by car.

  Last Saturday Charlie went to buy some medicine for his mother. Bad luck! When he came out of the shop, he couldn't find the car. He was quite worried and began to look for it in front of the shop but he didn't find it. Suddenly he saw a woman parked a car there and hurried into the shop. Charlie saw the car wasn't locked. He got on it and drove it at once. He was afraid the loser would run after him and drove fast. A truck hit it at a crossing and he lost consciousness.(知觉)

  This morning the young man came back to life and saw there were a few policemen standing by his bed. He asked, "Where am I?"

  "In Room 103."

  "In hospital or in prison ?"

小题1:There’re ________ people in Charlie's family.

A.four

B.five

C.six

D.seven小题2:Charlie’s family moved to the old house outside the city because _______.

A.it's very quiet there

B.they hoped to save some money

C.he could get to his office by train

D.his father had found a job there小题3:Charlie has to get to his office on time because ___________.

A.the head is strict with them

B.he wishes to be praised

C.he's usually on duty     

D.he's afraid to be fired小题4:For         did Charlie buy any medicine last Saturday?

A.himself

B.his father

C.his sister.  

D.his mother小题5:Charlie was afraid ________, so he drove fast.

A.to be late        

B.to meet the red lights

C.to be caught by the loser

D.to miss the 6:30 train