8的个不是应该是spent on 么,怎么是in啊

He spent his life in the service of others.不是说spend ...on... spent on 与spent in 有什么区别? Money spent on the brain is never spent in vain. on the morning of june 25 不是应该是in the morning 怎么回事on the mor 英语翻译我想翻译的是 Cathy在我心里应该是Cathy on me 还是in me 急 有2500个零件,从中检验5%.应该是多少啊?是怎么算的? 为什么氧原子质子数是8,不是6么,电子层应该是26啊 he spent most their time working in the fields为什么不是对的? weekdays前的介词应该是什么?(on.in.at?) 化工容器设计反应容器设计和压力容器是不是不是一个东西的啊?设计反应容器应该是怎么个思路呢? spent的原形是 The money we spent on the new project in beijing ( ) 8 milli