你确定是刹车系统出了问题吗？
黄某彬称，事发时踩刹车，刹车没反应，造成与前方校车追尾。[{'character': '黄', 'pinyin': 'huang2', 'highest pitch': 10.12, 'lowest pitch': 8.21, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '某', 'pinyin': 'mou3', 'highest pitch': 10.43, 'lowest pitch': 6.24, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '彬', 'pinyin': 'bin1', 'highest pitch': 10.05, 'lowest pitch': 8.76, 'duration': 0.2, 'prosody hierarchy': '#1'}, {'character': '称', 'pinyin': 'cheng1', 'highest pitch': 9.96, 'lowest pitch': 8.12, 'duration': 0.35, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.19}, {'character': '事', 'pinyin': 'shiii4', 'highest pitch': 10.01, 'lowest pitch': 9.46, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '发', 'pinyin': 'fa1', 'highest pitch': 10.46, 'lowest pitch': 9.46, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '时', 'pinyin': 'shiii2', 'highest pitch': 9.89, 'lowest pitch': 7.43, 'duration': 0.24, 'prosody hierarchy': '#2'}, {'character': '踩', 'pinyin': 'cai3', 'highest pitch': 8.58, 'lowest pitch': 5.27, 'duration': 0.23, 'prosody hierarchy': 'null'}, {'character': '刹', 'pinyin': 'sha1', 'highest pitch': 8.64, 'lowest pitch': 5.38, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '车', 'pinyin': 'che1', 'highest pitch': 9.53, 'lowest pitch': 8.14, 'duration': 0.29, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.25}, {'character': '刹', 'pinyin': 'sha1', 'highest pitch': 8.64, 'lowest pitch': 7.22, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '车', 'pinyin': 'che1', 'highest pitch': 9.53, 'lowest pitch': 7.22, 'duration': 0.18, 'prosody hierarchy': '#1'}, {'character': '没', 'pinyin': 'mei2', 'highest pitch': 10.29, 'lowest pitch': 7.52, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '反', 'pinyin': 'fan3', 'highest pitch': 10.29, 'lowest pitch': 4.1, 'duration': 0.22, 'prosody hierarchy': 'null'}, {'character': '应', 'pinyin': 'ing4', 'highest pitch': 6.66, 'lowest pitch': 4.1, 'duration': 0.24, 'prosody hierarchy': '#3'}, {'pinyin': 'sp1', 'highest pitch': 0.0, 'lowest pitch': 0.0, 'duration': 0.31}, {'character': '造', 'pinyin': 'zao4', 'highest pitch': 8.12, 'lowest pitch': 6.45, 'duration': 0.19, 'prosody hierarchy': 'null'}, {'character': '成', 'pinyin': 'cheng2', 'highest pitch': 7.28, 'lowest pitch': 6.1, 'duration': 0.26, 'prosody hierarchy': '#2'}, {'character': '与', 'pinyin': 'v3', 'highest pitch': 7.39, 'lowest pitch': 4.75, 'duration': 0.22, 'prosody hierarchy': '#1'}, {'character': '前', 'pinyin': 'qian2', 'highest pitch': 7.07, 'lowest pitch': 6.04, 'duration': 0.24, 'prosody hierarchy': 'null'}, {'character': '方', 'pinyin': 'fang1', 'highest pitch': 9.33, 'lowest pitch': 7.07, 'duration': 0.17, 'prosody hierarchy': '#1'}, {'character': '校', 'pinyin': 'xiao4', 'highest pitch': 9.84, 'lowest pitch': 7.43, 'duration': 0.18, 'prosody hierarchy': 'null'}, {'character': '车', 'pinyin': 'che1', 'highest pitch': 9.53, 'lowest pitch': 7.53, 'duration': 0.16, 'prosody hierarchy': '#1'}, {'character': '追', 'pinyin': 'zhuei1', 'highest pitch': 10.34, 'lowest pitch': 9.47, 'duration': 0.2, 'prosody hierarchy': 'null'}, {'character': '尾', 'pinyin': 'uei3', 'highest pitch': 10.03, 'lowest pitch': 3.18, 'duration': 0.33, 'prosody hierarchy': '#4'}]