xiao qiang.could you tell me the meaning of this worl ,pleas

选either
too多用于口语,位于句末或句中,只用于肯定句,前面一般用逗号隔开.
They are students,too.=They,too,are students.
also一般用在句中（一般放在be动词和助动词之后,行为动词之前）.
She is also a teacher.She also likes teaching.
as well 用用肯定句中,通常用于剧中或句尾.
He knows French,and he knows English as well.
either 表示也时,通常用于否定句中.该题中表示否定,故用either.