What are advantages of physical objects ?

A. intelligence development
B. to obtainvivid perceptual cognition
C. to cultivate students' observation and perception
D. to create teaching situations
E. beused to display teaching contents

Basic modeling elements for sticks figures:

Principles of material selection for audio and video:

Modern teaching mostly combine multimedia to present the main teaching content. Teachers would like to take the content on multimedia as the main board writing.and the blackboard as the attached board writing.

A. 对
B. 错

schematic diagram is not conductive to present teaching content visually, facilitate students to find the connection between knowledge points and help to cultivate students' observation and thinking ability.

A. 对
B. 错