5.The main idea of this passage
is that satellites are now used in __________.
A. taking pictures of the earth
B. receiving pictures of the atmosphere
C. weather forecasting D. doing
other work in many ways
Passage 27
Paragraph 1
Scientists have learned a lot
about the kinds of people need. They say that there are several kinds of food
that people should eat every day, they are: (1) green and yellow vegetables of
all kinds; (2) citrus (柑桔) fruits and tomatoes; (3) potatoes
and other fruits and vegetables; 94) meat of all kinds, fish and eggs; (5) milk
and foods made from milk; (6) bread or cereal (谷类), rice
is also in this kind of food; (7) butter, or something like butter.
Paragraph 2
People in different countries
and different places of the world eat different kinds of things. Foods are
cooked and eaten in many different kinds of ways. People in different countries
eat at different times of the day. In some places people eat once or twice a
day; in other countries people eat three or four times a day. Scientists say
that none of the differences is really important. It doesn’t matter whether
foods are eaten raw or cooked, canned (罐装的) or
frozen (冷冻的).
It doesn’t matter if a person eats dinner at 4 o’clock in the afternoon or at
eleven o’clock at night. The important thing is what you eat every day.
Paragraph 3
There
are two problems, then, in feeding the large number of people on the earth. The
first is to find some way to feed the world’s population so that no one is
hungry. The second is to make sure that people everywhere have the right kinds
of food to make them grow to be strong and healthy.