排中律的根本作用是什么（）？
A、保证思想的统一性
B、保证命题的正确性
C、保证思想的明确性
D、保证概念的唯一性
参考答案：C
判断下列说法是(√)否(×)正确。
( ) 1. He likes skirt. She likes skirt. They are the same.
( ) 2. Do you like pink? No, I like pink.
( ) 3. These are grapes.
( ) 4. I like playing with my doll.
( ) 5. I draw a picture with my book.
试分析磨尾排渣多的原因？
