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All foods contain water--cabbage and other leaf vegetables contain as much as 93% water, potatoes and other root vegetables 80% , lean meat 75% and fish anything from 80% to 60% depending on how fatty it is. If this water is removed, the activity of the bacteria(细菌) which cause food to go bad is checked.
Nowadays most foods are dried mechanically. The conventional method of such dehydration(脱水) is to put food in chambers through which hoi air is blown at temperatures of about 110°C at entry to about 43°C at exit. This is the usual method for drying such things as vegetables, minced meat, and fish.
Liquids such as milk, coffee, tea, soups and eggs may be dried by pouring them over a heated horizontal steel cylinder or by spraying them into a chamber through which a current of hot air passes. In the first case, the dried material is scraped off the roller as a thin film which is then broken up into small, though still relatively coarse flakes. In the second process it falls to the bottom of the chamber as a fine powder.
Dried foods 'take up less room and weigh less than the same food packed in cans or frozen, and they do not need to be stored in special conditions. For these reasons they are invaluable to climbers, explorers and soldiers in battle, who have little storage space. They are also popular with housewives because it takes so little time to cook them.
The chief point of the second paragraph is about ______.
A．the comparison of lean meat and fish
B．the removal of water in food
C．the water content in food
D．the relationship between water and food
Two hours later, my friend telephoned me from the flat.At the moment, he said, he was listening to some of my re- cords after having just had a truly wonderful meal.He had found a pan on the gas stove and fried two eggs and had helped himself to some cold chicken from the refrigerator.Now he said, he was drinking a glass of orange juice and he hoped I would join him.I asked him if he had reached the flat without difficulty, he answered that he had not been able to find the key under the stone, but fortunately the living-room window just by the apple tree had been open and he had climbed in.I listened to all this in astonishment.There is no apple tree in front of my living room, but there is one in front of my neighbor's.
1.When his friend arrived from abroad the writer was______ .
A . at the airport
B . at home
C . still at the office
D . on his way home
2.As the writer was busy and couldn't go home on time, he asked his friend ().
A.to cook something for him
B.to have a meal and drink himself
C.to wait for him to have dinner together
D.to go into the kitchen and cook first
3 .Two hours later, the writer () .
A.got home and met his friend
B.was listening to some records
C.rang up his friend
D.got a phone call from his friend
4.Knowing his friend's arrival, the writer had ().
A.left the living room window open
B.asked his neighbor to receive his friend
C.managed to go home later than usual
D.hid the key for him somewhere near the door
5.The writer was surprised to find that his friend had () .
A.entered his neighbor' s house by mistake
B.entered his living room by climbing the apple tree
C.entered his house through a neighbor' s window
D.got into the living room with a neighbor' s key
According to the author, in factory, vegetable food ________.
A) is easy for chickens to digest
B) is insufficient for the needs of poultry
C) is fully utilised in meat and egg production
D) is inefficiently converted into meat and eggs
A.migrated
B.matched
C.mingled
D.melted
According to the passage, it is now quite usual for women to ______.
A．stay at home after leaving school
B．marry men younger than themselves
C．start working again later in life
D．marry while still at school
A.in a way
B.in the way
C.by the way
D.on the way
A．Religion and immortality.
B．Life and death.
C．Love and marriage.
D．War and peace.
The official statistics on productivity growth______.
A．exclude the usual rebound in a business cycle
B．fall short of businessmen's anticipation
C．meet the expectation of business people
D．fail to reflect the true state of economy
单句理解
听力原文：On Sundays the bank doesn't open at the usual time and it is closed at 4:00 p. m..
(1)
A．On Sundays the bank is open till 4:00 p.m..
B．On Sundays the bank is open till 4:30 p. m..
C．On Sundays the bank is closed at 4:30 p. m..
D．On Sundays the bank opens at the usual time.
