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【单选题】
Manufacturers make most engine piston from ______, which is less than half the weight of iron.
A.
iron
B.
nickel
C.
chromium
D.
aluminum
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【简答题】Listen to the speech again and complete the outline below. After the listening, you may organize the speech with the outline in this exercise. NO MORE THAN 3 WORDS in each blank. I. life expectancy --...
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【单选题】Which of the following statements is NOT true according to the passage?
A.
Life expectancy is an important index in the ranking.
B.
Poverty rates and progress for women suggest that rich nations are relatively prosperous.
C.
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D.
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Life expectancy is an important index in the ranking.
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Poverty rates and progress for women suggest that rich nations are relatively prosperous.
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