题目内容：

 

第三部分：阅读理解（共20小题；每小题2分，满分40分）

阅读下列短文，从每题所给的A、B、C、D四个选项中，选出最佳选项。

The human body is a living machine , and , like all machines , it needs “fuel” (燃料) to supply it with energy . This is provided by the food we eat . But how much do we need to stay healthy ?

The energy value of food is usually measured in calories . A calorie is the amount of heat required to raise the temperature of 1 kg of water by 1℃. The number of calories people need per day is different , as the pictures show . Also , the number of calories you use at any one moment normally depends on the activity you are in . For example , you need more calories for standing than for sitting , more for running than for walking , and so on .

The energy in food is in the form of three kinds of chemical materials-carbohydrate （碳水化合物）, protein（蛋白质）and fat . Carbohydrate provides 3.8 Cal/gm , protein4.0 Cal/gm , and fat 8.8 Cal/gm . Each food contains different amount of these materials , as the round pictures show .

 

 

 

 

 

 

 

 

 

1．The amount of calories supplied by equal amounts of milk , rice , and peanuts is the largest in the case of          .

         A．milk B．rice   C．peanuts    D．rice or peanuts

2．Choose one statement from among A-D that agrees with the passage and the pictures above .

         A．You need more calories for swimming than for mountain climbing .

         B．Food contains energy in the form of carbohydres , proteins and fuel .

         C．Different people need different amounts of energy depending on their age , sex and the activities they are in .

            D．3 grams of milk provides 16.6 calories because carbohydrate provides 3.8 Cal/gm , protein 4.0 Cal/gm and fat 8.8 Cal/gm .

3．This article mainly tells us ________________.

         A．all the energy is in food

         B．the human body needs energy

         C．the number of calories depends on your activity

         D．we must only eat peanuts to get calories