宫颈刮片适用于

A. 正确
B. 错误

A. the change in the quantity demanded of hamburger when hamburger increases by 30 pence per pound
B. the percentage increase in the quantity demanded of hamburger when the price of hamburger falls by 1 per cent per pound
C. the increase in the demand for hamburger when the price of hamburger falls by 10 per cent per pound
D. the decrease in the quantity demanded of hamburger when the price of hamburger falls by 1 per cent per pound

A. 正确
B. 错误

A. 25%
B. 20%
C. 10%
D. 0.15
E. 0.05