DIV中有3段文字和圖片
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<p style="font-size:12px;">含有雜質的玉米經過第一層，第二層，第三層篩網，玉米中的碎玉米芯，皮屑，葉，毛須，癟糧，發霉的玉米，小石子，塵土等雜質從不同的排雜料口排出，干凈的玉米從篩選機出料口流出。</p>
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<span class="cd-date" style="font-size:30px;font-weight:600;color:#fff;">比重精選</span>
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<p style="font-size:12px;">種衣劑是用于種子包衣的新制劑，主要由殺蟲劑、殺菌劑、復合肥、微量元素、植物生長調節劑等加工制成的藥肥復合型種子包衣新產品。使用包衣種子，可以有效促進農作物生長，提高農作物產量和品質．有效防治病蟲害，減輕環境污染。</p>
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<span class="cd-date" style="font-size:30px;font-weight:600;color:#fff;">藥物包衣</span>
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<p style="font-size:12px;">精量播種改變了傳統的耕種方式也改變了包裝的計量單位，以重量為包裝計量方式向以計粒定量方式的改變使包裝單位更適合大田栽培的要點，便于農戶購種和農業技術推廣。有的品種計粒包裝也給企業帶來了邊際效益。</p>
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<span class="cd-date" style="font-size:30px;font-weight:600;color:#fff;">數粒包裝</span>
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我要實作文字展示的時候 ，一個字一個字的展示出來，文字完全出來后，再顯示圖片，圖片展示完成，間隔1秒再展示第二段
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