班级保教人员的言谈举止对幼儿具有极强的示范作用，这说明班级保教工作具有什么的特点？

单项选择题Mycenaean is the oldest known form of the Greek language. It was spoken on the Greek mainland and on Crete in the Mycenaean period. The language is written on clay tablets in a script called_______. A、Linear A B、Linear B C、Linear C D、Linear D

单项选择题某月内，甲商品的替代品和互补品的价格同时上升，引起甲商品的需求变动量分别为 50单位和80单位，则在这类商品价格变动的共同作用下，该月甲商品的需求量变动情况