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Which of the following types of coal has the highest energy content and produces the fewest polluting chemicals?
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In the reading, yao chen-yuan describes traveling to deliver a message. why was he willing to risk danger to travelto tientsin? he wanted to the boxers with their cause
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As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter
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Which of the following types of coal has the highest energy content and produces the fewest pollutin...
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