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$(selector).slideDown(speed, callback);

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• selector锛氳鎵ц鍔ㄧ敾鐨勫厓绱犮€?/li>
• speed锛氬彲閫夊弬鏁帮紝瑙勫畾鍔ㄧ敾鐨勯€熷害锛岄粯璁ゆ槸"normal"銆傚彲浠ヤ娇鐢ㄧ殑鍊兼湁锛?slow"銆?fast"鎴栬€呮绉掓暟銆?/li>
• callback锛氬彲閫夊弬鏁帮紝鍔ㄧ敾瀹屾垚鍚庤鎵ц鐨勫嚱鏁般€?/li>

绀轰緥锛?br>HTML浠ｇ爜锛?/p>

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