教学反思最集中体现在积极验证阶段。 ( )
参考答案:错
小学低年级儿童的想象必须依靠( )
A.具体操作
B.具体对象
C.具体概念
D.语词
How long do you think ______ the Microsoft brings out a new product?
A.it will be before
B.will it be until
C.will it be when
D.it will be that