英语100篇精读荟萃（中级篇）30a

时间：2007-09-17 07:17:51

（单词翻译:单击）

Passage Thirty (Fingerprints1)
The search for latent prints is done in a systematic3 and intelligent manner. Investigators5 develop techniques to locate traces of fingerprints at a crime scene. The basic premise6 in searching for latent prints is to examine more carefully those areas, which would most likely be touched by persons who have been on the scene. The natural manner in which a person would use and place his hands in making an entrance or exit from a building or in handling any object is the key to the discovery of latent prints.
Where a forced entrance has been made, latent prints are likely to be found on any surface adjacent to or at that point. Any object with a smooth, non-porous surface is likely to retain latent prints if touched. Fingerprints on rough surfaces are usually of little value. If the fingermark does not disclose ridge7 detail when viewed under a reading glass, the chances are that its value in identification is nil8 when photographed. Where fingermarks are found, it will be necessary for the investigator4 to compare them against the ones of persons having legitimate9 access to the premises10 so that the traces might be eliminated as having evidentiary value if they prove to be from these persons. Places to search for prints on an automobile11 are the rear view mirror, steering12 wheel hub, steering column, windshield dashboard and the like.
Dusting of surface may be done with a fine brush or with an atomizer. The whit13 powders used are basically finely powdered white lead, talc, or chalk. Another light powder is basically Chemist’s gray. A good black powder is composed of lampblack, graphite, and powdered acacia. Dragon’s blood is good powder for white surface and can be fixed14 on paper by heating. In developing latent prints, the accepted method is to use the powder sparingly and brush lightly. Do not use powder if the fingermark is visible under oblique15 lighting16. It can be photographed. A good policy for the novice17 is to experiment with his own prints on a surface similar to the one he wishes to search in order to determine the powder best suited to the surface. Fingerprints after dusting may be lifted by using fresh cellulose tape or commercially prepared material especially designed to lift and transfer dusted latent fingerprints.
In addition to latent prints, the investigator must not overlook the possibility of two other types of fingerprint2 traces: molded impression and visible impression. Molded impressions are formed by the pressure of the finger upon comparatively soft, pliable18, or plastic surfaces producing an actual mold of the fingerprint pattern. These can be recorded by photograph without treating the surface, is usually most effective in revealing the impressions clearly. Visible impressions are formed when the finger is covered with some substance which is transferred to the surface contacted. Fingers smeared19 with blood, grease, dirt, paint, and the like will leave a visible impression. If these impressions are clear and sharp, they are photographed under light without ant treatment. Ordinarily, prints of this type are blurred20 or smeared and do not contain enough detail for identification by comparison. However, they can not be overlooked or brushed aside without first being examined carefully.

1.    What is the best title for this passage?
[A]. Visible impressions. [B]. Moulded impressions.
[C]. Fingerprints. [D]. Latent fingerprints.
2.    How many fingermarks are mentioned in this passage?
[A]. 2. [B]. 3. [C]. 4. [D]. 5.
3.    Which type of fingerprints is most likely to retain?
[A]. Latent fingerprints. [B]. Visible impressions.
[C]. Moulded impressions. [D]. Clear fingerprints.
4.    How many ways are there to develop fingerprints?
[A]. 2. [B]. 3. [C]. 4. [D]. 5.

Vocabulary
1.    latent print 潜在指2.    纹
3.    premise 前提
4.    non-porous 无孔的，5.    不6.    渗透的
7.    ridge 脊，8.    隆起部
9.    nil 无，10.    零
11.    premise 房屋及其附属部件
12.    rear view mirror 后视镜
13.    steering wheel hub 驾驶盘
14.    steering column 转向柱
15.    windshield 挡风玻璃
16.    dashboard 仪表盘，17.    挡泥板
18.    atomizer 喷雾器
分享到：


点击收听单词发音收听单词发音  

1 fingerprints 9b456c81cc868e5bdf3958245615450b     
n.指纹( fingerprint的名词复数 )v.指纹( fingerprint的第三人称单数 )
参考例句：
  • Everyone's fingerprints are unique. 每个人的指纹都是独一无二的。
  • They wore gloves so as not to leave any fingerprints behind (them). 他们戴着手套，以免留下指纹。 来自《简明英汉词典》
2 fingerprint 4kXxX     
n.指纹；vt.取...的指纹
参考例句：
  • The fingerprint expert was asked to testify at the trial.指纹专家应邀出庭作证。
  • The court heard evidence from a fingerprint expert.法院听取了指纹专家的证词。
3 systematic SqMwo     
adj.有系统的，有计划的，有方法的
参考例句：
  • The way he works isn't very systematic.他的工作不是很有条理。
  • The teacher made a systematic work of teaching.这个教师进行系统的教学工作。
4 investigator zRQzo     
n.研究者，调查者，审查者
参考例句：
  • He was a special investigator for the FBI.他是联邦调查局的特别调查员。
  • The investigator was able to deduce the crime and find the criminal.调查者能够推出犯罪过程并锁定罪犯。
5 investigators e970f9140785518a87fc81641b7c89f7     
n.调查者，审查者( investigator的名词复数 )
参考例句：
  • This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
  • The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》
6 premise JtYyy     
n.前提；v.提论，预述
参考例句：
  • Let me premise my argument with a bit of history.让我引述一些史实作为我立论的前提。
  • We can deduce a conclusion from the premise.我们可以从这个前提推出结论。
7 ridge KDvyh     
n.山脊；鼻梁；分水岭
参考例句：
  • We clambered up the hillside to the ridge above.我们沿着山坡费力地爬上了山脊。
  • The infantry were advancing to attack the ridge.步兵部队正在向前挺进攻打山脊。
8 nil 7GgxO     
n.无，全无，零
参考例句：
  • My knowledge of the subject is practically nil.我在这方面的知识几乎等于零。
  • Their legal rights are virtually nil.他们实际上毫无法律权利。
9 legitimate L9ZzJ     
adj.合法的，合理的，合乎逻辑的；v.使合法
参考例句：
  • Sickness is a legitimate reason for asking for leave.生病是请假的一个正当的理由。
  • That's a perfectly legitimate fear.怀有这种恐惧完全在情理之中。
10 premises 6l1zWN     
n.建筑物，房屋
参考例句：
  • According to the rules,no alcohol can be consumed on the premises.按照规定，场内不准饮酒。
  • All repairs are done on the premises and not put out.全部修缮都在家里进行，不用送到外面去做。
11 automobile rP1yv     
n.汽车，机动车
参考例句：
  • He is repairing the brake lever of an automobile.他正在修理汽车的刹车杆。
  • The automobile slowed down to go around the curves in the road.汽车在路上转弯时放慢了速度。
12 steering 3hRzbi     
n.操舵装置
参考例句：
  • He beat his hands on the steering wheel in frustration. 他沮丧地用手打了几下方向盘。
  • Steering according to the wind, he also framed his words more amicably. 他真会看风使舵，口吻也马上变得温和了。
13 whit TgXwI     
n.一点，丝毫
参考例句：
  • There's not a whit of truth in the statement.这声明里没有丝毫的真实性。
  • He did not seem a whit concerned.他看来毫不在乎。
14 fixed JsKzzj     
adj.固定的，不变的，准备好的；(计算机)固定的
参考例句：
  • Have you two fixed on a date for the wedding yet?你们俩选定婚期了吗？
  • Once the aim is fixed,we should not change it arbitrarily.目标一旦确定，我们就不应该随意改变。
15 oblique x5czF     
adj.斜的，倾斜的，无诚意的，不坦率的
参考例句：
  • He made oblique references to her lack of experience.他拐弯抹角地说她缺乏经验。
  • She gave an oblique look to one side.她向旁边斜看了一眼。
16 lighting CpszPL     
n.照明，光线的明暗，舞台灯光
参考例句：
  • The gas lamp gradually lost ground to electric lighting.煤气灯逐渐为电灯所代替。
  • The lighting in that restaurant is soft and romantic.那个餐馆照明柔和而且浪漫。
17 novice 1H4x1     
adj.新手的，生手的
参考例句：
  • As a novice writer,this is something I'm interested in.作为初涉写作的人，我对此很感兴趣。
  • She realized that she was a novice.她知道自己初出茅庐。
18 pliable ZBCyx     
adj.易受影响的；易弯的；柔顺的，易驾驭的
参考例句：
  • Willow twigs are pliable.柳条很软。
  • The finely twined baskets are made with young,pliable spruce roots.这些编织精美的篮子是用柔韧的云杉嫩树根编成的。
19 smeared c767e97773b70cc726f08526efd20e83     
弄脏； 玷污； 涂抹； 擦上
参考例句：
  • The children had smeared mud on the walls. 那几个孩子往墙上抹了泥巴。
  • A few words were smeared. 有写字被涂模糊了。
20 blurred blurred     
v.（使）变模糊( blur的过去式和过去分词 )；（使）难以区分；模模糊糊；迷离
参考例句：
  • She suffered from dizziness and blurred vision. 她饱受头晕目眩之苦。
  • Their lazy, blurred voices fell pleasantly on his ears. 他们那种慢吞吞、含糊不清的声音在他听起来却很悦耳。 来自《简明英汉词典》

©2005-2010英文阅读网