4.
Choose the best answer.
Milk is a favorite
drink of people all around the world. Not only is it a popular drink, it is
also used as an ingredient in cakes, puddings, sauces, and many other foods.
Milk is very important for your health, but it takes many steps to bring milk
from the farm to your table at home. Where does milk come from?
Goats,
camels, all llamas (美洲脆)produce milk that
people drink. So do reindeer, sheep, and water buffalo. The type of milk you
drink depends on where in the world you live. Most people drink milk that comes
from special cows called dairy cattle. Most dairy cattle are black and white
and they are raised in very sanitary(卫生的)conditions.
People used to squeeze milk from cows by hand, but now milking machines are
used. After milk leaves the cow, it has to be kept clean and cool, or else
dangerous bacteria will grow quickly.
Milk goes
through many stages before you can drink it. First, it is put in a large tank
where many tests are done. Next, it is cleaned in order to remove any dust,
hair or dirt that is found.
The milk
production goes through five more important steps. First, milk is divided for
different uses. Milk will become either regular milk, cream, butter, or other
dairy produces. Milk is then heated to a very high temperature to kill any
bacteria. This process, called pasteurization, is named for Louis Pasteur, the
doctor who invented it.
Next, any
fat that may be in the milk is broken up evenly. This prevents the fat tram
rising to the top. In the fourth step, important nutrients, such as vitamins
and proteins, are added to the milk.
Drinking
milk is important for the good health of adults and children. Milk helps your
body grow and develop and gives you energy. Drinking milk also helps prevent
certain diseases. Important vitamins and minerals in milk make your bones
stronger. Do you drink enough milk?