即使需求曲线上每点的斜率不同，每点的弹性也可能是一样的。
参考答案：对
血脂不包括
A．脂肪
B．胆固醇
C．糖脂
D．丙酮酸
E．磷脂
It is the teacher _____taught me when I was a child _____ I’m going to visit.
A．that, which
B．who, that
C．who, which
D．whom, that
