try_one's-hand是加on还是at?

try_one's-hand是加on还是at? 是on one hand,还是on the one hand对? 是on one hand,on the other hand还是on the one hand,one the other hand还是都可以? 在一方面 到底是用“on the one hand”还是“on one hand”.one又不是序数词 前面为啥可以加定冠词the啊 到底是on the one hand ...,on the other hand还是on one hand...on the other hand?第一个到底有没有the? On the one hand...on the other hand还是On one hand...on the other hand? 是in one's hand还是in one's hands in the other hand介词是on还是in, in my hand和on my hand有什么区别?If cat lick your hand,yhey just want toeat salt ____ your hand.是in还是on? Tom,please __(hand)in your homework on time是填hand还是hands? 是congratulations on还是congratulation on?祝贺应是congratulation为什么要加-s lay one's hand on=show one's hand , 时针用英语咋说?是hour's hand?还是hour hand 是hand还是hands 是with hand 还是by hand? raise your hand为什么hand不加s 关于on the one hand和on the other hand的造句和用法比如我说On the one hand this activity is interesting,on the other hand it makes people happy.这样造行不?,我还想知道on the one hand和on the other hand是放在句首还是句末 stand on one's hand是动词词组么,如果不是,又是什么?