Nick is a student. He has four friends. They are Ben, Eric, Peter and Andy. But they are all very different. Nick is confident and kind. He is also a good listener. All of his friends like to talk to him about their problems. This is his best quality. Ben is the quietest friend of them. He is not energetic and active like Eric, or outgoing like Peter. But he is so patient and fair. When they have an argument, Ben is always there to listen to everyone and make sure that everybody stays friends. Andy is very clever and hard-working. He does the best in exams at school. It is really kind of Andy to help Peter with his homework when he is having trouble. They get along well with each other like brothers.

小题1:What do you think of Ben?

A．He is just like Peter.

B．He is energetic and active.

C．He likes to argue.

D．He is quiet, but fair and patient.小题2: What is Nick’s best quality?

A．He is confident.

B．He is kind.

C．He has good friends.

D．He is a good listener.小题3:What is Peter like ?

A．Energetic

B．Outgoing

C．Quiet

D．Patient and fair小题4: What is it kind of Andy to do ?

A．To help Peter with his homework.

B．To do well in exams

C．To help Nick with his homework.

D．To be hard-working and clever.小题5:Who is always there to make sure that everyone stays friends when they have an argument?

A．Peter

B．Eric

C．Andy

D．Ben

下列关于索引的说法，错误的一项是( )。

A．索引越多越好

B．一个索引可以有一个或多个字段组成

C．可提高查询效率

D．主索引值不能为空，不能重复