与多项式7a2-5ab-3b2的和是3a-24ab+7b2的多项式是( )。
-4a2+ab+10b2
It is fashionable to drive a car, but to drive a car is not nearly as difficult as it is imagined on condition that you ________ the specialized rules.
A.give up
B.stick to
C.insist on
D.connect to
某种食物氧化时,每消耗一升氧所产生的热量,称为该种食物的______。