下列叙述符合达尔文自然选择学说的是（） A．伦敦桦尺蠖黑_爱下问搜题

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问题选择题

下列叙述符合达尔文自然选择学说的是（　　）

A．伦敦桦尺蠖黑化现象是煤烟熏黑的结果

B．野兔的保护色和鹰锐利的视觉是它们相互选择的结果

C．北极熊为适应冰天雪地的环境，毛色产生了白色变异

D．长颈鹿经常努力伸长颈和前肢去吃高处的树叶，因而颈和前肢都很长

答案

A、伦敦地区环境颜色的改变对桦尺蠖的体色进行了选择，桦尺蠖黑化现象是自然选择的结果．故不符合题意．

B、具有保护色变异的野兔在与鹰的生存斗争过程中更容易生存下去，而具有锐利视觉变异的鹰在与野兔的生存斗争中更容易捕获到野兔，在长期的相互选择中，形成了野兔的保护色和鹰锐利的视觉；故符合题意．

C、白色对生活在冰天雪地的环境北极熊是一种保护色；生物的变异是随机的，不定向的，具有白色的毛色变异的北极熊更容易适应冰天雪地的环境而生存下去，经过长期的自然选择，北极熊的毛色形成了白色；故不符合题意．

D、古代的长颈鹿存在着颈长和颈短、四肢长和四肢短的变异，这些变异是可以遗传的，四肢和颈长的能够吃到高处的树叶，就容易生存下去，并且繁殖后代；四肢和颈短的个体，吃不到高处的树叶，当环境改变食物缺少时，就会因吃不到足够的树叶而导致营养不良，体质虚弱，本身活下来的可能性很小，留下后代的就会就更小，经过许多代以后，四肢和颈短的长颈鹿就被淘汰了，这样，长颈鹿一代代的进化下去，就成了今天我们看到的长颈鹿．故不符合题意．

故选：B

完形填空

Last winter, when I was heavily pregnant(怀孕), I was visiting my sister and brother-in-law’s house. I had to park my car in a nearby parking lot because they didn’t have a place for parking. The snow was extremely heavy and there was lots of    1   on the ground, so not many people dared to go out that evening! When I left their house and    2   to my car around 11pm, I noticed that my car was the only one    3  .
Surrounded by silence, I rushed into the car nervously. When I finally tried to   4   away, my wheels began to spin(打滑). I realized I was stuck! I wondered what I should do.   5  , in my rear-view mirror(后视镜), I saw four teenage boys    6   my car. They were walking side by side in a line and behaved a bit like    7   ------ at least I thought that was what they looked like. My car was in a very    8   area and I was so frightened when I saw them. I was certain they were coming to my car to    9   me.
Terrified, I just froze. One of the young men tapped on my window    10   and said, “Excuse me, Madam, would you like some    11  ? You seem to have a problem with the car.” Still a little afraid, I said, “I am stuck.” And the young man said, “It’s okay. Stay in your car and we’ll    12   you out of the snow.” And they did! When they finally got my car out of the snow, they   13  and waved good-bye to me. I rolled down my window and thanked them,    14   to have judged them so poorly.
People like to judge the person they come across, and they are in turn judged by others. It’s natural that we judge others, but when we do this, we shouldn’t    15   the old saying, “Don’t judge a book by its cover.”

D．approaching

问答题

某高新技术企业2004年8月份开业，注册资金220万元，当年发生经营活动如下：
(1)领受工商营业执照、房屋产权证、土地使用证各一份；
(2)建账时共设8个账簿，其中资金账簿中记载实体资本220万元；
(3)签订购销合同4份，共记载金额280万元；
(4)签订借款合同1份，记载金额50万元，当年取得利息0.8万元；
(5)与广告公司签订广告制作合同1份，分别记载加工费3万元，广告公司提供的原材料7万元；
(6)签订技术服务合同1份，记载金额60万元；
(7)签订租赁合同1份，记载租赁费金额50万元；
(8)签订转让专有技术使用权合同1份，记载金额150万元。
要求：按下列顺序回答问题，每问均为共计金额：
(1)计算领受权利许可证照应缴纳的印花税；
(2)计算设置账簿应缴纳的印花税；
(3)计算签订购销合同应缴纳的印花税；
(4)计算签订借款合同应缴纳的印花税；
(5)计算签订广告制作合同应缴纳的印花税；
(6)计算签订技术服务合同应缴纳的印花税；
(7)计算签订租赁合同应缴纳的印花税；
(8)计算签订专有技术使用权转让合同应缴纳的印花税。