题目内容
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A．Because they thought he was still in China.
B．Because they thought be was put into prison.
C．Because they thought he was working for the Chinese government.
D．Because they thought he was dead.
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B．Psychologists.
C．The modern TV audience.
D．The ancient Greek audience.
A．forgetfulness is a response to learning
B．the memory storage system is an exactly balanced input-output system
C．memory is a compensation for forgetting
D．the capacity of a memory storage system is limited because forgetting occurs
A．interpret the function of forgetting
B．illustrate the process of adapting
C．explain the performance of memory
D．emphasize the importance of learning
B．She will draw up a program.
C．She will join the "Green Movement".
D．She is not sure what she will do.
B．She begins to get on well with her parents.
C．She always stayed with her parents.
D．She rented a government house and lived alone.
All living things need water and man discovered that if this water is removed, the activity of the bacteria which causes food to go bad is prevented. In other words, we can protect some of our food by drying it. Besides, living things can only grow at certain temperatures, so we can also protect our food by heating or cooling it.
A New York man had an idea. He filled a wooden railroad car with tons of butter. The car was hooked to a train and pulled from New York to Boston. How could this be done？ The butter was packed in ice, and twice during the trip more ice was added. This was the first refrigerator ear. As a matter of fact, People also used wooden boxes filled with ice to keep their food. Now we have mechanical refrigerator cars and mechanical refrigerators at home and stores and other places that need them.
(33)
A．Food had to be kept in the ice box.
B．Fresh food must be eaten within one or two days after being shipped from the fame.
C．Food must be delivered from the farm within one or two days.
D．Food must be kept in the places near the farm.
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