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As的用法

as的九大用法: 一)as作副词,表示程度,意为“同样地”。在“as...as...”,“not as...as...”结构中的第一个as是副词,作“和/与...(不)一样”解。eg: Jack is as tall as his father.杰克和他的父亲一样高。 He doesn't speak En...

一,副词adv: 1. 跟...一样地,同样地 例如:I'm as tall as him 我和他一样高。 2. 如同;例如 例如:There are lots of famous buildings as the Eiffel Tower and the Arch of Triumph. 这里有许多著名建筑如埃菲尔铁塔和凯旋门。 二,介词prep...

1、该结构的意思是“与......一样”。 2、接形容词或副词的原级,在否定句中,第一个 as 也可换成 so。如:He doesn't study as [so] hard as his brother. 他学习不如他弟弟努力。 3、表示涉及数量或程度,可用“as much+不可数名词+as”和“as many...

as有三种记性: 连词conj. 因为;随着;虽然;依照;当…时,如: As Napoleon once said, attack is the best method of defence. 拿破仑曾经说过,进攻是最好的防御。 介词prep. 如同;当作;以…的身份,如: As a young man, Eliot had studie...

as 的含义和用法 1。as 是连词,表示“随着”的意义。lives是life的复数,意义是“生活”。 2。as 是连词,表示“因为,由于”的意义。wanting是现在分词,表示主动意义,wanting to buy cars=who want to buy cars。 As的用法小结 as可以作连词、介词...

一:as可以作为别名的标志。 sql:select name as username form tablename; 解释:上面语句的意思就是查询出tablename表中字段name的所有记录,并且给name别名为username。 二:as可以作为连接语句的操作符。 sql:create table tablename as s...

就是别名的作用,在查询中,比如select name as mycol from table 就是table表中有个字段叫name,但是我想把这个字段查询出来后的列名显示成mycol ; 比如select t.name from (select a.mycol from table a) as t 就是我把select a.mycol from t...

as的用法: As prep.1.\x05像;如同They were all dressed as clown.他们都打扮成小丑.2.\x05作为;当作Treat me as a friend.要把我当作朋友.The news came as a shock.消息传来,令人震惊.She had been there often as a child(=when she was a...

MSDN给出的解释是: as 运算符用于在兼容的引用类型之间执行某些类型的转换。 说明白了,就是把基类类型转换成派生类类型 比如Winform的ListBox的每一项都是object类型,将一个string丢进去以后,下次再取出的时候是一个object。这时候,想还原...

是给现有的字段名另指定一个别名的意思,比如: select username as 用户名,password as 密码 from users 补充:比如其中的一个好处是:当字段名是英文或拼音缩写时,采用汉字替代之后可以给阅读带来方便

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