在第一秒钟用at the first second还是on the first second

在第一秒钟用at the first second还是on the first second at first与at the first的区别另at first可以用在句中吗?eg:Although it made me not feel well at first,yet . It's the first time ,for the first time ,the first time ,at first 区别?哪个后面加过去时态 He's the first ____(arrive) at the station let's look at the pandas first同义句：let's ( )( )( )( )the pandas first May day is not in March.It's ( ) May the first.用in on at 填空 lest's look at the dolphins first.同义句 Let's( look at the ingredient) first.(划线提问） turn left at the first crossing 在哪条路什么时候用at什么时候用On 在第一张图片中.应该是At the first first photo 还是In the first photo. at the first crossing XuHaifeng won China's first Olympic medal为什么省略the.这句话在冀教版英语第一课出现 1、请问it's on the corner of main and first avenue.为什么要加main?在转角处主要的第一大街,好不通顺啊!2、on the corner of main and first?在转角处的主要和第一? first of all first the first at first的区别 at the first,at first与first的区别 一个英语关于at the first sight 和at first sight的区别（在线等）关于一见钟情是用那个at the first sight 和at first sight两者的区别是什么?by the way请不要黏贴没价值的东西,谢谢!在词典上查有at first sig Let's look at the lions first.(同义句转换）Let's _______ ________ ________ __________ the lions first. let's look at ________picture and then look at picture_____-A first secondB the first TwoC One TwoD the first the two说出理由