九年級英語上冊unit5lookintosciencelesson26keepthecandleburning教學課件新版冀教版(編輯修改稿)
2025-07-11 12:07 本頁面
【文章內容簡介】 of the jar rests on the dish. As the candle burns, it the oxygen in the air. When the candle stops , it has used up all the oxygen in the air. The water inside the jar and fills about of the jar. This is because about one fifth of the air is made up of oxygen. match Let burning risesWhat is happening? 1) 分數由分子和分母兩部分構成。用英語表達時，分子用基數詞，分母用序數詞 。 2) 如果分子為 1，則分母的序數詞是單數形式，如果分子大于 1，則分母的序數詞用復數形式。 3)
教學教案相關推薦
鄂ICP備17016276號-1