1. 下列式子是分式的是( ). A. B. C. y D. 2. 要使分式有意义,则x的取值范围是( ). A. x≠1 B. x>1 C. x<1 D. x≠-1 3. 下列各式与相等的是( ). A. B. C. (x≠y) D. 4. 化简-的结果是( ). A. -x-y B. y-x C. x-y D. x y 5. 化简 1-(m 1)的结果是_______.
Relevance theory as a new kind of language cognition model theory features of strong practicability and maneuverability. Cultural differences between China and