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听力原文：How is index used to measure the changes in economy？
(31)

A. They use unemployment rates to judge the decline measured by the index.
B. They use the interest rates to confirm the growth of economy.
C. They use percentage to represent the changes weighed by the index.
D. They use stocks as the measurement of development in market.

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According to the author, the distortions of reality ______.

A. are related to the methods of observation
B. can never be avoided
C. are caused by human perceptual mechanism
D. can easily be corrected

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The plastic bags were first produced in the 1970s and grew increasingly popular since the

A. Y
B. N
C. NG

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【B10】

A. of
B. among
C. by
D. including

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听力原文：How about farmers' income in the late 1970s？
(34)

A. Farmers had less money to spend than other Americans.
B. Farmers earned about one-third the income of non-farmers.
C. Farmers earned almost as much money as the non-farmers.
D. Farmers earned more money than the average American families.

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听力原文：How is index used to measure the changes in economy？(31)

A. They use unemployment rates to judge the decline measured by the index. B. They use the interest rates to confirm the growth of economy. C. They use percentage to represent the changes weighed by the index. D. They use stocks as the measurement of development in market.

According to the author, the distortions of reality ______.

The plastic bags were first produced in the 1970s and grew increasingly popular since the

【B10】

听力原文：How about farmers' income in the late 1970s？(34)

听力原文：How is index used to measure the changes in economy？
(31)

A. They use unemployment rates to judge the decline measured by the index.
B. They use the interest rates to confirm the growth of economy.
C. They use percentage to represent the changes weighed by the index.
D. They use stocks as the measurement of development in market.

听力原文：How about farmers' income in the late 1970s？
(34)