NO.PZ2018062003000006
问题如下：
Which of the following is an appropriate statement regarding the movement along of good X along demand curve?
选项：
A.Change in policy
B.Change in good X’s price
C.Change in income
解释：
B is correct.
"Movement along"refers to a movement of a point rather than a line movement. Only change in own price can result in movement along.
考点：需求曲线
解析：当该商品价格变化时，需求曲线上的点会沿着需求曲线移动。所以B入选
A选项和C选项说法只会导致需求曲线本身发生平移
你好老师，我想问问这个move along线，或者线移动这个是怎么能够来理解，或者是有什么知识点可已解释下吗？谢谢
