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COAL BURNING ______ A. DOES NO HARM B. IS TAUGHT I...
COAL BURNING ______ A. DOES NO HARM B. IS TAUGHT IN SCHOOLSC. IS D...
5 DE THI TRAC NGHIEM
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38. Coal burning ______
a. Does no harm b. Is taught in schools
c. Is dilution d. Is local pollution
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38.
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5 DE THI TRAC NGHIEM