在实施WLAN和运营商室内分布网络中，常用到的射频电缆对WLAN信号损耗描述正确的是

在下面横线处写出诗文原句。（8分）

（1）沙鸥翔集，              ；             ，郁郁青青。（范仲淹《岳阳楼记》）

（2）凭谁问，廉颇老矣，             ？   （辛弃疾《永遇乐•京口北固亭怀古》）

（3）             ，随君直到夜郎西。        （李白《闻王昌龄左迁龙标遥有此寄》）

（4）登高而招，            ，而见者远；             ，声非加疾也，而闻者彰。

（荀子《劝学》）

（5）而世之奇伟、瑰怪、非常之观，            ，而人之所罕至焉，            。 （王安石《游褒禅山记》）

新鲜血液加入抗凝剂后，上层淡黄色半透明的液体是（　　）

A．红细胞

B．白细胞

C．血小板

D．血浆

语法填空。

     My name is Elias. I am a poor black worker in South Africa. The time l_____ I first met Nelson Mandela

was a very difficult period of my life. I was twelve years old. It was in 1952 and he had opened a black law

firm to advise poor black people 2_____ their problems.

     I began school at six. The 3_____ where I studied only two years was three kilometres away. I had to

leave, 4_____ my family could not continue to pay the school fees and the bus 5_____. I could not read

6_____ write. After trying hard, I got a job in a gold mine. This was a time when one had got to have a

passbook to live in Johanneburg. 7_____ (sad) I did not have this passbook because I was not born there and 

I was worried 8_____ whether I would be out of work.

     The day when Nelson Mandela told me what to do and helped me was one of the 9_____ (happy) days of

my life. He told me how to get the correct papers so I could stay in Johanneburg. I never forgot 10_____ kind

he was and when he organized the ANC Youth League, I joined it as soon as I could.

张某2008年购置一临街的商铺，支付买价50万元，2011年10月份，其将商铺转让，取得转让收入90万元。不考虑其他税费，张某10月份应缴纳的个人所得税税额为( )万元。

A．8
B．18
C．6.4
D．14.4

A公司在2012年2月就其公司所有资产(共1000万元)向B保险公司进行了投保，保险合同约定保险金额为1000万元。后A公司因担心B保险公司存在无力支付保险金从而影响其正常运营的可能性，于2012年3月与C保险公司再次就其全部资产进行了投保，约定保险金额400万元，后因雷击起火，公司财产实际损失600万元。则下列选项当中说法错误的是( )。

A．A公司不得要求C保险公司退还部分保费
B．A公司可以要求B保险公司退还部分保费
C．C保险公司应当向A公司赔付保险金200万元
D．B保险公司应当向A公司赔付保险金400万元