the shadow of a pencil in the sun , its ______ , ______ , ______ will change as the time goes by in one dayquickly !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!快!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

问题描述:

the shadow of a pencil in the sun , its ______ , ______ , ______ will change as the time goes by in one day
quickly !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
快!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

direction,length,light