聽錄音,準確填出劃線部分的單詞或詞組,點擊填空答案,顯示正確答案!
Science is done _ . First an idea is formed. Then this is tested by an _.The outcome, one hopes, results in an increase in _.
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聽錄音,準確填出劃線部分的單詞或詞組,點擊填空答案,顯示正確答案!
Science is done _ . First an idea is formed. Then this is tested by an _.The outcome, one hopes, results in an increase in _.