1.degradation
n. 降级[反]elevation
n. 堕落；退化（生物）<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
2.degrade
v. （使）降级；（使）堕落
degrade oneself by cheating 因欺骗而自甘堕落
v. （使）退化
3.delegate
n. 代表
[同]representative
4.deliberate
adj. 深思熟虑的，蓄意的
a deliberate lie 存心的谎言
[同]intentional
adj. 审慎的，不慌不忙的
a deliberate speech 从容而谨慎的演说
5.deliberately
adv. 审慎地，蓄意地
6.denial deny
n. 否认
They didn’t admit his denial of guilt. 他们对他否认有罪不予承认。
[同]negation
n. 拒绝
the denial of a request for help 拒绝他人的求助
[同]rejection
[难点]
make a denial of … 否认…
7.denote
vt. 指示，表示
[同]indicate
vt. 意味着
The sign x usually denotes an unknown quantity. 符号x通常代表一未知数。
[同]mean
8.denounce
vt. 谴责，痛斥
be denounced as a coward 被指责为懦夫
[同]criticize
vt. 揭发，告发
denounce sb. as a spy 揭发某人为奸细
[难点]
denounce sb. to … 向…告发某人
They denounced the man to the police. 他们向警方告发了那人。
9.density
n. 浓密，密集
the density of a forest / the population 森林的茂密/人口的稠密
n. 密度（物理）；愚钝
10.dentist
n. 牙医
11.dependant
n. 靠别人生活，眷属；侍从
12.deposit
n. 存款，押金，保证金
I drew 1,000 yuans from my deposit. 我从存款中提出一千元。
n. 矿床
oil deposit 油田
13.deposition
n. 免职，罢免；证言；淤积，沉淀
14.depression
n. 沮丧，消沉
He is suffering from mental depression. 他情绪很低落。
n. （商业）不景气，萧条期
[同]slump
n. 洼穴，坑
[同]hollow
15.deprive
vt. 剥夺，使丧失
These trees deprive my house of light. 这些树遮住了我房屋的光线。
[同]strip
vt. 免去…的职务
[难点]
deprive sb. of… = sb. be deprived of … 剥夺某人的…
They deprived him of his rights. 他们剥夺了他的权利。
16.deputy
n. 代理人
act as a deputy for sb. 做某人的代理人
[同]agent
n. 代表，议员
a deputy to the National People’s Congress 人大代表
[同]representative
adj. 副的，代理的
a deputy mayor 副市长
[同]vice
[难点]
deputy for sb. 某人的代理人
deputy to … 某（组织，机构等）的代理人
17.derivation
n. 引出，导出；起源，由来
[同]origin
六级范文：
Directions: For this part, you are allowed thirty minutes to write a composition on the topic My view on the Negative Effects of Some Advertisements. You should write at least 120 words and you should base your composition on the outline (given in Chinese) below:
1. 现在有些不良的商业广告
2. 这些广告的副作用和危害性
3. 我对这些广告的态度
Nowadays ther are a lot of false advertisements in society. They have caused many harms to society. Generally, their harms can be listed as follows.
First, they exaggerate夸大 the functions of the goods they advertise and mislead consumers. Second , some advertisements contain obscene淫秽的 contents and bring about spiritual精神上的 pollution. Third, they seriously damage the credit of businesses because the shops which sell those goods will be distrusted and even considered the conspirators同谋者 of those advertisers by consumers.
Personally, I am usually vigilant against any advertisements and so I have never been taken in. However, some people are credulous and are easily taken in. Therefore, in my opinion, effective measures must be taken to ban false advertisements and protect consumers' interests. First, all the advertisements must be strictly censored by the authorities concerned before they are published. Besides, severe punishment must be inflicted on those who publish illegal advertisements.
In conclusion, false advertisements must be eliminated清除，消除 in our society.