单词：a
音标：[ei] ；
柯林斯词典等级：5 级；
牛津三千核心词汇；
第一个字母 A; 一个; 第一的
art. [计] 累加器, 加法器, 地址, 振幅, 模拟, 区域, 面积, 汇编, 组件, 异步
art. [计] 累加器, 加法器, 地址, 振幅, 模拟, 区域, 面积, 汇编, 组件, 异步
n. the 1st letter of the Roman alphabet
n. the blood group whose red cells carry the A antigen
n. the blood group whose red cells carry the A antigen
词型变化：名词复数形式 : some
考试类型：[中考/高考]
考试类型：[中考/高考]
词性分布：
a的用法和样例：
例句
用作冠词(art.)
- There is a pen on the table.桌子上有一支笔。
- We have a problem.我们有个问题。
- I can only carry two at a time.我一次只能带两个。
- Let's go to a Chinese restaurant.我们去一家中餐餐馆。
- A cat is an animal.猫是动物。
词汇搭配
- with a pinch of salt有保留地
- stand a chance有希望
- a dose of one's own medicine自己惹来的恶果,自己...
- flog a dead horse徒劳无益
- keep a stiff upper lip坚定不移(顽强不屈...
- a bag of bones骨瘦如柴的人...
- once in a blue moon罕见的，极少的，难得...
- show a clean pair of heels逃走(溜之大吉)...
- birds of a feather同类型的人
- with a grain of salt有保留地
- bring to a stand终止
- turn over a new leaf重新开始
- as a matter of fact事实上
- bring to a standstill结束(使终止...
- turn up again like a bad penny不要它偏又回来,挥去...
- at a loose end无事做
- throw a fit大发脾气
- blow a fuse使保险丝熔断(勃然大...
- cut a poor figure出丑
- take something with a grain of salt将信将疑
经典引文
Now 'a is a-praying.
出自：Hamlet,ShakespeareDoctors, they knaws nowt, for a says what's nawways true.
出自：TennysonI have..said many A prayer upon her grave.
出自：Winter's Tale,ShakespeareI had a dove and the sweet dove died.
出自：KeatsAs good a student As any in the house.
出自：C. TomlinsonThey had passed and repassed each other a dozen times.
出自：M. LaskiIn Ealing on a Sunday Bell-haunted quiet falls.
出自：J. BetjemanThe quene was brought a bedde.
出自：Ld BernersStand a tip-toe.
出自：Henry V,ShakespeareThat's enow a' conscience! Compounds:
出自：C. Tourneur
【近义词】
- any任何的
- one一
- axerophthol抗干眼醇
- ampere[电]安培
- angstrom埃(长度单位)...
- angstrom unit埃（长度单位）...
- amp安培数
- adenine腺嘌呤
- antiophthalmic factor抗干眼因素
- deoxyadenosine monophosphate单磷酸脱氧腺苷(DNA的...
- vitamin A维生素A