A：若两个有理数的差是正数，则这两个数都是正数
B：两数相乘，积一定大于每一个乘数
C：0减去任何有理数，都等于此数的相反数
D：倒数等于本身的为1，0，﹣1
ab减去a2﹣ab+b2等于（ ）
Name
Li Mei
Age
13
Study at
No. 1 Middle School, Class 8, Grade 7
School
not very big, trees, flowers
a school library, a reading room……
Teachers
kind ……
After-school activities
play tennis, swim……
My school
has，sheep，uncle，my，ten(．)
____
