5426.quality(名)品质
When costs are cut, product quality suffers.
一降低成本，产品品质就会受到影响。

5427.quantity(名)量；数量
Is it available in sufficient quantity?
这东西能不能足量供应？

5428.queer(形)奇怪的
同义词poculiar
A queer expression is on his face.
他脸上有一种奇怪的表情。

5429.questionnaire(名)问卷、调查表
Please fill up the blanks in the questionnaire.
请把调查表填写一下。

5430.quiver(动)使震动、抖动
The bridge quivered as the truck crossed it.
这座桥在卡车通过时有点颤动。

5431.quotation(名)引言、引文；报价、报价单
The book began with a quotation from Goethe．
这本书一开头引用了歌德的隽语。

5432.quote(动)引用；报价
The author frequently quoted Shakespeare.
这位作家经常引用莎士比亚的话。

5433.racial(形)种族的
As long as poor people, who in general are colored, are in conflict with richer people,who in general are lighter skinned, there's going to be a constant racial conflict in the world.
穷人，一般说属有色人种，富人，一般肤色较浅，只要他们之间有矛盾，世界上就将有不断的种族冲突。

5434.rack(名)架子、置物架
I looked through a rack af clothes at the back of the shop.
我看遍了放在商店里面的一架子衣服。

5435.racket(名)喧哗
What a racket the children are making!
孩子的声音多吵闹！

5436.radar(名)雷达
They located the ship by radar.
他们通过雷达确定了船只的位置。

5437.radical(形)根本的、根号
These developmants have effected a radical change in social life.
这些发展使社会生活发生了根本变化。

5438.rag(名)破布、旧布
The children were dressed in rags.
孩子们穿着破衣烂衫。

5439.rage(名)愤怒、狂怒
He went into a rage when he learned about it.
他知道此事后大发雷霆。

5440.raid(动)袭击、突击
Village were raided along the border.
边境线上的村庄受到袭击。

5441.rail(名)铁轨；栏杆(动)用栏杆隔开
(名):The company has gone badly off the rails in recent years.
这家公司最近几年已经陷入严重瘫痪。
(动):The machine was railed off as a safety precaution．
为了安全起见，把这台机器用围栏隔开了。

5442.rainfall(名)降雨量
There has been below average rainfall this month.
这个月的降雨低于平均降雨量。

5443.raise(动)举起；气死回生；饲养
He raised a hand in greeting.
他举起手表示问候。

5444.raisin(名)葡萄干
I'd Iike to buy some raisin cookies, please.
我要买些葡萄干夹心饼干。

5445.raliy(动)召集、集合
同义词gather
The officer railied his men．
军官把士募兵集合起来。

5446.ranch(名)牧场
Ranch life has always centered around the cowboys．
牧场的生活总是以牛仔为中心。

5447.rancher(名)牧场主人、农场主人
Papa was a rancher—he worked with horses.
我爸爸是个牧场主，专门和马打交道。

5448.random(名)任意行动；随机过程
短语at random
The competitors were chosen at random from the audience．
那些参赛者是从观众中随便选出的。

5449.rank(动)并排(名)阶级、等级
(动):Arizona ranhed second of all states in its growth rate of population．
亚利桑纳州在全国人口增长率中排名第二。
(名):The governor.the mayor and other people of rank were invited to the ceremony.
州长、市长和其他高官都受邀参加典礼。

5450.rape(名)强暴
The man who had committed several rapes was arrested.
那个犯了多起强奸案的男人被抓起来了。

5451.rapture(名)着迷
The children gazad at her in rapture．
孩子们欣喜若狂地看着她。

5452.rare(形)罕见的、珍贵的
同义词uncommon
Environmentalists were able to preserve the rare turtle before it reached extinction.
环境保护论者能在这种稀有龟类绝种之前把它保育下来。

5453.rarely(副)很少地
Only rarely do I eat in restaurants．
我极少到餐厅吃饭。

5454.rascal(名)流氓
Come here，you little rascal!
过来，你这个小坏蛋！

5455.raw(形)生的
His literary style is still rather raw．
他的文学风格还很不成熟。

5456.ray(名)光线；鱼
The windows were shining in the reflected rays of the setting sun.
窗户上闪耀着落日的余晖。

5457.react(动)反应
How do acids react metals?
酸对金属会引起怎样的化学反应？

5458.reaction(名)反应；影响
My immediate reaction was one of shock.
我当下的反应是大吃一惊。