起始于釉质牙本质界伸向釉质的纺锤状结构，是成牙本质细胞胞质突的末端膨大并穿过釉质牙本

公安机关及其人民警察( )，是构成公安赔偿责任的必要条件。

A．采取强制措施造成损害结果
B．实施处罚造成损害结果
C．使用武器、警械造成损害结果
D．违法行使职权

阅读下文，回答问题。

①我是一个喜欢在人家门前徘徊的孩子，无意间看见小花猫或蓝风铃什么的，都会引逗得我在人家门口默默望上半天。我的一双眼睛以外永远是一扇门，把自己内心世界与外面的大世界隔绝开来，于是心中就总是酝酿着孩提时代的那种清纯，于是眼睛就总是贪婪地向门外张望。

②从前一直认为那扇门很大，大得连风雨都推不动。那时门里只有爸爸妈妈、姐姐和玩具熊，一本旧旧的连环画早就翻烂了；一首催人人梦的童谣早就唱厌了；一段关于公主与巫婆的故事早就听腻了……可门却关的那么严，我出不去。只好经常站在窗前，夏天看窗外的白鹭在云里钻来钻去，心里便也插上了翅膀飞出大门；冬天用手在窗花上模仿各种野兽在雪地中的脚印，每一串脚印都跳到了门外……懂事的时候，我就试图接近那扇门，有时间就与它培养感情，跟它说话，给它唱歌，向它做鬼脸儿……可是不论我怎样讨好，它都不理我，它离我好远呵!

③后来，我可能是长大了，在某年某月的某一天，那扇门竟訇然向我洞开了。我一下子仿佛置身于另一个清新的世界。跑啊跳啊，朋友也多起来，调皮的鸟，溢香的花，青翠的山，幽蓝的湖，还有伙伴的友情，对知识的求索，对异性那种神秘而清纯的爱慕……排山倒海地向我堆来。穿越过一段时间的隧道，我终于跨过了这扇既陌生又熟悉的大门。

④由小男孩迅速长成个小伙子，这不能不算是大自然对自己的慷慨。那扇绚丽芬芳的五彩门已经被丢在身后了，喜欢在门前徘徊的我，突然像失去了什么，周围是一片空蒙寂寥，于是便发现了自己的孤独。总想把甜蜜和痛苦都揉进梦里，让一个清丽修长的身影夜夜光着脚熨干我潮湿的情绪；总想把静谧和骚动都捏进指缝，让一个绵软的笑时时眯着眼流进我荒凉的田野。

⑤这就是我所踏上的青春的阶梯吗?这样的年龄悄悄地来了，这样的季节悄悄地来了，谁也无法回避。青春的门应该是属于诗的，它不仅流着执着的血浆，还燃烧着热情的生命。清晨，我在它的呼唤中醒来，夜晚，我在它的抚慰中睡去；仅仅是在短暂的瞬间，我便迎来了青春之门，我便告别了青春之门，向人生的又一新领域奋力攀登。仅仅是在短短的路途中，便留下了一生中最多最多的回忆……

⑥想停下来深情地沉湎一番，怎奈行驶的船却没有铁锚；想回过头去重温旧梦，怎奈身后早已没有了归途。因为时间的钟摆一刻也不曾停顿过，所以使命赋予我们将在汹涌的大潮之中不停地颠簸。

⑦生命不是一张永远旋转的唱片；青春也不是一张永远不老的容颜。爱情是一个永恒的故事，从冬说到夏，又从绿说到黄；步履是一个载着命运的轻舟，由南驶向北，又由近驶向远……你看到那阳光明媚，金色羽毛升起的地方，矗立在歌吟里、掩映在诗词中的不分明是一扇神奇玄妙的青春之门么?

⑧人生就像是小姑娘跳方格格一样，无论愿不愿意，都必须跨过这一扇庄严的大门。

1、作者紧扣“迎来”和“告别”两个阶段抒发自己对青春的体悟，在这两个阶段中，作者的主要感受是什么?(4分)

“迎来”阶段：_________________________________________________________________ 

“告别”阶段：__________________________________________________________________

2、第⑦段中，作者说：“生命不是一张永远旋转的唱片；青春也不是一张永远不老的容颜”，在本文中，抒情的重点在哪个比喻上?结合文章，说说这个比喻的用意。(3分)

___________________________________________________________________________    ___________________________________________________________________________3、根据文意，用一句话来概括下面这段话的意思。(2分)

想停下来深情地沉湎一番，怎奈行驶的船却没有铁锚；想回过头去重温旧梦，怎奈身后早已没有归途。

答：□□□□□□□□□□。

4、对这篇文章的赏析，正确的三项是(    )(6分)

A．在第②自然段，作者说“可是不论我怎样讨好，它都不理我，它离我好远呵”，写出了未长大时的自己对青春的向往和迷惘。

B．在第③自然段中，作者说“我一下子仿佛置身于另一个清新的世界”，在这“另一个”世界中，“我”幻想青春岁月能给人带来莫大的精神享受。

C．作者说青春之门曾经“既陌生而又熟悉”，后来又说那是一扇“绚丽芬芳的五彩门”，写出了自己从在“门前徘徊”到“跨过”这扇门后的微妙的心境变化。

D．在第⑤自然段中，作者说“青春的门应该是属于诗的”，这是因为对于青春岁月，人们有无穷的语汇来形容它。E、在本文的结尾处，作者有一个精彩的比喻，“人生就像是小姑娘跳方格格一样”，表达了要以乐观积极的态度走过整个人生的愿望。

F、本文以“青春之门”为话题，却从孩提生活入手，是因为写孩提时对青春的向往和迷惘，能引发读者对“青春之门”的认知愿望。

一对平行轴的外啮合斜齿圆柱齿轮传动时，两轮的螺旋角大小应相等，旋向应相同。

影响员工培训的外部因素的是（）。

A、企业的行业特点

B、工会

C、员工的素质水平

D、管理人员的发展水平

[A] Advertisements add interests to life

[B] Advertisements help to save money

[C] Criticisms on advertisers

[D] Usefulness of small advertisements

[E] True aesthetic value of advertisement

[F] Informing: the chief function of advertising

41__________

Advertisers tend to think big and perhaps this is why they’re always coming in for criticism. Their critics seem to resent them because they have a flair for self-promotion and because they have so much money to throw around. "It’s iniquitous," they say, "that this entirely unproductive industry (if we can call it that) should absorb millions of pounds each year. It only goes to show how much profit the big companies are making. Why don’t they stop advertising and reduce the price of their goods After all, it’s the consumer who pay..."

42__________

The poor old consumer! He’d have to pay a great deal more if advertising didn’t create mass markets for products. It is precisely because of the heavy advertising that consumer goods are so cheap. But we get the wrong idea if we think the only purpose of advertising is to sell goods. Another equally important function is to inform. A great deal of the knowledge we have about household goods derives largely from the advertisements we read. Advertisements introduce us to new products or remind us of the existence of ones we already know about. Supposing you wanted to buy a washing machine, it is more than likely you would obtain details regarding performance, price, etc. , from an advertisement.

43__________

Lots of people pretend that they never read advertisements, but this claim may be seriously doubted. It is hardly possible not to read advertisements these days. And what fun they often are, too! Just think what a railway station or a newspaper would be like without advertisements. Would you enjoy gazing at a blank wall or reading railway laws while waiting for a train Would you like to read only closely-printed columns of news in your daily paper A cheerful, witty advertisement makes such a difference to a drab wall or newspaper full of the daily ration of calamities.

44__________

We must not forget, either, that advertising makes a positive contribution to our pockets. Newspapers, commercial radio and television companies could not subsist without this source of revenue. The fact that we pay so little for our daily paper, or can enjoy so many broadcast programs is due entirely to the money spent by advertisers. Just think what a newspaper would cost if we had to pay its full price!

45__________

Another thing we mustn’t forget is the "small ads." which are in virtually every newspaper and magazine. What a tremendously useful service they perform for the community! Just about anything can be accomplished through these columns. For instance, you can find a job, buy or sell a house, announce a birth, marriage or death in what used to be called the "hatch, match and dispatch" columns; but by far the most fascinating section is the personal or "agony" column. No other item in a newspaper provides such entertaining reading or offers such a deep insight into human nature. It’s the best advertisement for advertising there is !

44（）