session做先行词引导的定语从句用什么关系词?session是否可以看做抽象名词后面跟where?例句.

不能肯定，看具体语境！

不一定的.place当先行词,引导词都不能说一定用where的.It was also found that during the session where the mother smoked,the length of sleeping times was shortened.母亲吸烟后观察期间婴儿睡觉时间缩短.And i...