单模光纤由于只传输一种模式，故不存在模式色散，主要受材料色散、波导色散和偏振模色散的

Akuapem is in the eastern part of Ghana. The sun there shines all the time. The local people are very friendly and hospitable(好客的). Now let’s have a look at how Akuapem people receive a visitor.

A visitor is often welcomed warmly in a family of Akuapem. After the visitor is welcomed into the house, he is offered a seat and water at the very beginning, because the host assumes that the visitor must have come from a very long journey and need water. If there is a group of visitors, the host will greet the visitors from right to left. And the host shakes only with his right hand, because Akuapem people think the left hand is not clean.

Next, the visitor is asked how his journey was and why he has come. While the conversation is going on, the wife and the children, especially girls, are preparing food for the visitor. The visitor can choose his favorite food. After the visitor finishes eating, the host and the visitor go on with their conversation. Usually this is short one because the visitor is getting ready to say goodbye.

When the visitor is leaving, he is often given some food. He is also accompanied(陪伴) by one of the children to the nearest station. The child who accompanies the visitor will not come back home until the visitor leaves safely.

Whether he is a close friend or just a stranger, this is always how friendly Akuapem people receive a visitor.

小题1:The underlined word “assumes” here probably means “   ”.

A．thinks

B．remembers .

C．disagrees

D．follows小题2:Which of the following is TRUE to the passage?

A．The host talks little with the visitor.

B．The child accompanies the visitor to the gate of the house.

C．The host offers the visitor a seat only.

D．The visitor takes some food with him when he leaves.小题3: From the passage we know that Akuapem people are         .

A．noisy

B．friendly

C．impolite

D．quiet

根据价值工程的定义，价值工程具有的特征有()。

A.价值工程的目的是提高产品或服务的价值 

B.价值工程的核心是功能分析 

C.价值工程的对象是产品的功能 

D.价值工程是依靠集体智慧的有组织的活动 

E.价值工程的重点是成本分析

货运记录送查后，收货人领取货物时表示（）应及时通知有关站结案。

葡萄酒等酒标上经常会出现“干型”(Dry)这个词，请问这里的“干型”(Dry)是什么意思。

目前，全国在逃人员信息系统属（）建库。

A.部、省两级

B.部、省、市三级

C.部级

D.省级