Sarah is a keen walker. She lives in a big city. When she goes on holiday she likes to walk in the hills. She is looking for new places to go.

Jane is keen on music. She also likes reading about the personal life of famous people to find out what they are really like.

Peter is going to France next week on business. And he has a free weekend so he plans to spend it in Paris. He would like to find out what is happening there for fun and entertainment.

Mary likes clothes but hasn’t got much money so she is looking for ways of dressing smartly without spending too much.

Paul likes singing. He is also interested in history and likes reading about famous explorers from the past.

小题1:Who likes walking?

A．Sarah.

B．Jane.

C．Peter.

D．Mary.小题2:Why is Peter going to Paris?

A．On business.

B．For fun.

C．To find a job.

D．To go shopping.小题3:What does Paul like?

A．He likes clothes.

B．He likes music.

C．He likes exploring.

D．He likes reading.

简述NAVTEX的技术编码B1B2B3B4的具体含义。