问题
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Which of the following problems may occur when using fuel oil with a high sulphur content?
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What was one result of the increased use of machinery on farms of the United States?A.Pric
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With the increased use of high-tech communications equipment, business people ______ .A.ha
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The use of robots increases__________ 查看材料A.too muc
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The United States has decided toA.increase the use of the Internet.B.issue new regulations
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What is the passage mainly about?A.The increased use of private mail services.B.The develo