PROFILE温度曲线图是由升温区，恒温区，溶解区，降温区组成。
参考答案：对
写出一个开口向下的二次函数的表达式（ ）．
I have to eat _____ food than before, or I'll get fatter and fatter. [ ]
A. a few
B. fewer
C. less
D. little
