问题
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The load between two steam-driven alternators operating in parallel may be adjusted by varying .
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Large pipes or _____ are fitted between the steam and water drums to ensure good natural c
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By 1800 more than a thousand steam engines were in use in the British Isles, and Britain r
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This was before the steam locomotive, and canal building was at its height. The companies
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What is the possible relationship between the man and the woman?A.interviewer and intervie
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The relationship between words and things in the