听力原文:M: How is the energy content of food measured?W: It's measured in calories. The c
听力原文:M: How is the energy content of food measured?
W: It's measured in calories. The calorie is defined as the heat energy needed to raise the temperature of 1 kilogram of water from 14.5 degrees centigrade to 15.5 degrees centigrade.
Q: What does the woman define?
(16)
A.The kilogram.
B.The energy content.
C.Heat energy of water.
D.The calorie.