光缆弯曲半径应不小于光缆外径的（）A.7倍 B.10倍 C.15倍 D.20倍

阅读理解。

    This is a song millions of Americans will hear this New Year's Eve. It is called Auld Lang Syne (《友谊地

久天长》). It is the traditional music played during the New Year's celebration. Auld Lang Syne is an old

Scottish poem. It tells about the need to remember old friends.

    The words "auld lang syne" mean "old long since". No one knows who wrote the poem first. However, a

version by Scottish poet Robert Bums was published (出版) in 1796. The words and music we know today

first appeared in a songbook three years later.

    The song is played in the United States mainly on New Year's Eve. The version (译文) you are hearing

today is by the Washington Saxophone Quartet. As we end our program with Auld Lang Syne. I would like

to wish all our radio friends a very Happy New Year! This is Buddy Thomas.

1. This passage is from ______. [ ]

A. a newspaper.

B. a magazine.

C. a TV program.

D. a radio program.

2. ______ is introducing Auld Lang Syne to us. [ ]

A. Robert Bums.

B. The Washington Saxophone Quartet.

C. Buddy Thomas.

D. The passage doesn't tell us.

3. From the passage, we know that The song Auld Lang Syne mainly played in the USA ______. [ ]

A. On New Year's Eve.

B. On Christmas Eve.

C. On weekends. D.On holidays.

4.The words and music of Auld Lang Syne we know today first appeared ______.[ ]

A. In 1790.

B. In 1793.

C. In 1796.

D. In 1799.

5. The song Auld Lang Syne is about ______. [ ]

A. the history of Scotland

B. an old Scottish poet

C. the need to remember old friends

D. the wishes to the radio friends

巴西主要出口的农产品是[ ]

A．咖啡、蔗糖、大豆、可可    

B．剑麻、小麦、大豆、蔗糖

C．甘蔗、棉花、大豆、可可    

D．咖啡、黄麻、大豆、可可

管先生2005年11月新置房屋一套，总价100万元，首付款30万元，自2005年11月起按月等额本息还款，房屋贷款年利率5.54%，还款期限为20年。管先生自1995年1月开始参加住房公积金计划，假设每年年底个人按其上年年工资的5%向住房公积金个人账户供款，公司等额配比供款。已知1994年管先生月均工资2000元，年均工资24000元，工资年均增长率为3%，住房公积金年均投资收益率为3%。考虑到住房公积金的投资收益率低于房贷利率，管先生接受金融理财师的建议，于2006年1月初将累积的住房公积金全部取出用于偿还房屋贷款本金（房贷利率、剩余还款期限不变），以增加养老储蓄的供款能力。管先生接受金融理财师的建议后，每月偿还贷款的数额下降了（）。（答案取最接近值）

A.122.99元

B.245.99元

C.253.37元

D.266.99元

学习生物学，可以帮助我们建立良好的生活习惯，减少伤害或挽救生命，让我们生活更健康．下列做法你认为不正确的是（　　）

A．非处方药可以自行判断、购买和使用，但也要注意用药安全

B．不慎烧伤需要进行皮肤移植时，用异体皮肤往往会发生排异反应

C．用指压止血法抢救较大动脉出血的伤员时，要压迫伤口的远心端动脉

D．发现某人煤气中毒，立即打开门窗，将其移到通风处，拨打“120”后进行人工呼吸

真空三极管具有阳极、( )和栅极。

A．控制极

B．集电极

C．阴极

D．阳极