你知道什么是仓单吗？
一种表示商品所有权的财物证券，也称商品证券，如提货单、交货单。[{'character': '一', 'pinyin': 'i4', 'highest pitch': 10.15, 'lowest pitch': 7.82, 'duration': 0.17, 'prosody hierarchy': 'null'}, {'character': '种', 'pinyin': 'zhong2', 'highest pitch': 9.53, 'lowest pitch': 7.82, 'duration': 0.27, 'prosody hierarchy': '#2'}, {'character': '表', 'pinyin': 'biao3', 'highest pitch': 9.86, 'lowest pitch': 5.23, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '示', 'pinyin': 'shiii4', 'highest pitch': 7.96, 'lowest pitch': 5.58, 'duration': 0.23, 'prosody hierarchy': '#1'}, {'character': '商', 'pinyin': 'shang1', 'highest pitch': 11.29, 'lowest pitch': 6.99, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '品', 'pinyin': 'pin3', 'highest pitch': 11.22, 'lowest pitch': 5.85, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '所', 'pinyin': 'suo2', 'highest pitch': 7.71, 'lowest pitch': 5.85, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '有', 'pinyin': 'iou3', 'highest pitch': 8.4, 'lowest pitch': 6.04, 'duration': 0.16, 'prosody hierarchy': 'null'}, {'character': '权', 'pinyin': 'qvan2', 'highest pitch': 6.53, 'lowest pitch': 5.62, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '的', 'pinyin': 'de5', 'highest pitch': 7.41, 'lowest pitch': 6.23, 'duration': 0.13, 'prosody hierarchy': '#1'}, {'character': '财', 'pinyin': 'cai2', 'highest pitch': 8.31, 'lowest pitch': 5.92, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '物', 'pinyin': 'u4', 'highest pitch': 9.48, 'lowest pitch': 8.31, 'duration': 0.15, 'prosody hierarchy': '#1'}, {'character': '证', 'pinyin': 'zheng4', 'highest pitch': 11.12, 'lowest pitch': 8.51, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '券', 'pinyin': 'qvan4', 'highest pitch': 8.53, 'lowest pitch': 5.98, 'duration': 0.31, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.23}, {'character': '也', 'pinyin': 'ie3', 'highest pitch': 7.43, 'lowest pitch': 5.57, 'duration': 0.13, 'prosody hierarchy': 'null'}, {'character': '称', 'pinyin': 'cheng1', 'highest pitch': 8.58, 'lowest pitch': 5.65, 'duration': 0.25, 'prosody hierarchy': '#1'}, {'character': '商', 'pinyin': 'shang1', 'highest pitch': 11.29, 'lowest pitch': 10.44, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '品', 'pinyin': 'pin3', 'highest pitch': 11.22, 'lowest pitch': 5.4, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '证', 'pinyin': 'zheng4', 'highest pitch': 11.12, 'lowest pitch': 5.77, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '券', 'pinyin': 'qvan4', 'highest pitch': 8.53, 'lowest pitch': 4.62, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.31}, {'character': '如', 'pinyin': 'ru2', 'highest pitch': 8.32, 'lowest pitch': 7.07, 'duration': 0.26, 'prosody hierarchy': '#1'}, {'character': '提', 'pinyin': 'ti2', 'highest pitch': 8.44, 'lowest pitch': 7.1, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '货', 'pinyin': 'huo4', 'highest pitch': 10.7, 'lowest pitch': 7.19, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '单', 'pinyin': 'dan1', 'highest pitch': 9.13, 'lowest pitch': 8.41, 'duration': 0.3, 'prosody hierarchy': '#2'}, {'character': '交', 'pinyin': 'jiao1', 'highest pitch': 10.75, 'lowest pitch': 10.1, 'duration': 0.25, 'prosody hierarchy': 'null'}, {'character': '货', 'pinyin': 'huo4', 'highest pitch': 10.7, 'lowest pitch': 6.79, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '单', 'pinyin': 'dan1', 'highest pitch': 9.13, 'lowest pitch': 6.65, 'duration': 0.31, 'prosody hierarchy': '#4'}]