目前世界上已建成的核电站都是利用（ ） A．原子核的聚变释放的能量来发电的 B．

如图所示，一同学沿一直线行走，现用频闪照相记录了他行走中9个位置的图片，观察图片，能大致反映该同学运动情况的速度—时间图象是（     ）

阅读短文，完成问题。

　　①自然界中一些动物为了生存竞争、繁衍子孙，常会弄虚作假、玩弄骗术。其技巧之高超，简直令人难以想象。     

　　②装死是动物的一大伎俩，像椿象、金龟子，只要稍动它一下，它立刻会装死从农作物上掉落地面，过会儿又活动开来。鸭子似乎是傻乎乎的，但当其被红狐追捕时，会翻着白眼装死。有人曾做试验，用红狐追捕养鸭场的50只鸭子，竞有29只在狐爪下逃生。     

　　③蟹、虾、蛇、壁虎、水螅等能施用分身术，迷惑对方，保护自己。人们有时会发现有些蟹或虾的螯足一大一小，有的蛇或壁虎的尾巴粗细与身子相差悬殊，这绝不是先天的畸形，也不是什么稀有品种，而是当它们遇到了强敌，使出断足截尾的绝招，来一个“舍车保帅”，新的足或尾还未长成原来样子的缘故。水螅的分身术更高出一筹，它被切成数段之后，每一段都可像蚯蚓那样，长出新的完整的个体来。     

　　④变色法是动物的又一招数。栖息在北极圈的白狐、北欧山区的雪兔、日本北部的高山兔和我国新疆阿尔泰山区的雷鸟，能随着季节变化而改变颜色。如雷鸟，到白雪皑皑的时候，便银装素裹；当春暖花开时，又着上淡黄色的“春装”；盛夏炎暑，浑身又换成栗褐之色；当秋风萧瑟的时节来到，又穿上与环境协调一致的暗棕色羽裳。     

　　⑤见过竹节蝗、枯叶蝶的人，无不为它们的形态与所附着的茎叶是那么相似而叫绝，这是一种生就的拟态。生活在澳洲的叶海马，其体态能模拟周围物体，全身生出许多叶形突出物和丝状物，好似马尾藻一样，在海水中缓缓飘荡，使对手极难辨别。     

　　⑥有的动物甚至会“诈术”。一位学者曾发现，一只苍鹭为觅食一条小鱼，颇费了一番脑筋：它嘴叼一根小羽毛，在小溪岸边踱着方步，两眼扫视着浅浅的溪水。随即它突然止步，有意让羽毛掉进水里面；小鱼误以为是饵料，游近羽毛，苍鹭便以闪电般的动作扑向水面，吞食美味。     

　　⑦动物在面临它的对手或要达到某一目的时，绝不是简单地屈从或毫不掩饰其真面目。人们在认识和利用动物时，务必要注意到这点。

1．用自己的话概括本文的中心。

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2．认真阅读短文，可以看出动物玩弄骗术的方式有____________等几种。

3．文章说明了动物“弄虚作假”的方式，采用了____________的方法，从局部看，则主要用举例子的方法，生动而形象地说明了____________。

4．摘录原文语句回答，加粗的“这点”是指____________。

5．加粗词“似乎”能否去掉？为什么？

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( )指项目在借款偿还期内各年可用于还本付息的资金与当期应还本付息金额的比值。

A．借款偿还率

B．利息备付率

C．偿债备付率

D．净现值率

Children in any society are expected to learn to conform to a number of social rules and expectations if they are to become participants in the culture. (46)Among the rules that children in our society are expected to learn are that certain classes of adults (such as teachers and doctors) are addressed by titles, that males and females use separate restroom facilities, and that women but not men wear dresses. These are examples of social conventions. In the absence of such a shared norm, the acts are neither right nor wrong. For this reason, conventions may be said to be arbitrary. For example, (47)we could just as easily have students address teachers by first names as have them call teachers by their last names and formal titles of Mr. or Ms.
Conventions, however, serve an important function by providing predictability and order to social life. (48)Without social conventions it would be impossible to organize social institutions such as schools, and societies as organized systems could not exist. The arbitrariness of conventions makes their importance difficult for children to figure out. (49) It is not until some time in adolescence that children come to fully understand the function that these arbitrary conventions serve to provide predictability and order to our social interactions.
In contrast with issues of convention are matters of morality. Morality refers to issues of human welfare, justice, and rights that are a function of the inherent features of interpersonal relations. Because of this, the right and wrong of moral actions are not simply determined by social consensus or the views of authority. For example, it is not possible to hit another person with force and not hurt the other person. Similarly, it is not possible to steal something valuable from someone else and not cause the person to experience the sense of loss. A moral judgment about unprovoked harm ( "It is wrong to hit") would not be dependent on the existence of a socially agreed upon rule or standard but could be generated solely from the intrinsic effects of the act (i.e., hitting hurts). (50)Similar analyses could be done regarding a broader range of issues that would extend beyond direct harm to concerns for what it means to be just, compassionate, and considerate of the rights of others.

城市规划力求体现（）。

A.适用性

B.超前性

C.动态性

D.科学性

E.规模性