无差异曲线的位置和形状取决于()。
A.消费者的偏好
B.消费者的收入
C.商品的价格
D.效用的大小
参考答案：A
She was disappointed to see the beautiful coat _____ she had bought the day before ______ with a lot of dust.
A．which; cover
B．that; covered
C．/; covering
D．where; covered
胸导联V5电极应放在（）。
A.胸骨右缘第四肋间
B.胸骨左缘第四肋间
C.左锁骨中线与第五肋间相交处
D.左腋前线V4水平处
E.左腋中线V4水平处
