[判断题]Calories, natural food, mountains and the distance from modem cities are the only common things in the three regions.

[判断题]Calories, natural food, mountains and the distance from modern cities are the only common things in the three regions.

[填空题]1 calories on a food package equals to 1 kilocalorie.

[填空题]1,000 calories on a food package equals to 1 kilocalorie.

[简答题]Why is canned fruit not considered as natural food

[单项选择]We are （） by doctors to eat more natural food.
A. suggested
B. advised
C. proposed
D. informed

[单项选择]The Appalachian Mountains (formation) a natural barrier (between) the eastern seaboard and the vast (lowlands) of the continental (interior) of North America.
A. formation
B. between
C. lowlands
D. interior

[填空题]Food calories come only from its potential energy such as the carbohydrates, protein and fat.

[填空题]Natural foods make up a small part of organic foods.

[单项选择]Calories
For years now, calories have been all the rage—people are counting them and cutting them, and you’d be hard-pressed to find something at the supermarket that does not list its calories per serving somewhere on the package. But have you ever wondered what exactly a calorie is
What Is a Calorie
A calorie is a unit of energy. We tend to associate calories with food, but they apply to anything containing energy. For example, a gallon (about 4 liters) of gasoline contains about 31,000,000 calories.
Specifically, a calorie is the amount of energy, or heat, it takes to raise the temperature of 1 gram of water 1 degree Celsius (1.8 degrees Fahrenheit). One calorie is equal to 4.184 joules (焦耳), a common unit of energy used in the physical sciences. Most of us think of calories in relation to food, as in "This can of soda has 200 calories." It turns out that the calories on a food package are actually kilocalories (1,000 calories=1 kilocalori
A. how much energy that food contains
B. the compilation of these three building blocks
C. how the energy is acquired
D. where does the food come from