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(69) {{/U}}the loudness, the quality and the musical note of his voice
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{{/U}}about. The fact that a good tea A. tell B. show C. express D. mean [单选题]登高平台消防车无论在任何情况下，只要工作平台和水平面之间的倾角超过（），当前动作会自动停止，并且发动机熄火。
A.10° B.15° C.20° D.25° [单项选择]为提高妇女儿童素质，应逐步提高新生儿疾病筛查率，新生儿听力筛查率应达到（）以上。
A. 50% B. 60% C. 70% D. 80% [单选题]开关箱与用电设备的水平距离不宜超过( )。
A.3m B.4m C.5m D.6m [多选题]工作间断，若工作班离开工作地点，应采取措施或派人看守，不让人、畜接近（）等。
A.挖好的基坑 B.未竖立稳固的杆塔 C.负载的起重和牵引机械装置 D.工作地点 [单项选择]肛管及肛门周围恶性肿瘤中，最常见的是（）
A. 鳞癌 B. 基底细胞癌 C. 肛周Paget病 D. 肛管混合癌 E. 恶性黑色素瘤 [单项选择]在快速眼动睡眠期（REM）出现焦虑、恐惧的梦境体验，版有惊恐情绪，以及心跳加速，呼吸急促，出汗等自主精神症状，醒后或次晨能清晰会议。可诊断为（）
A. 失眠症 B. 睡行症 C. 睡眠呼吸暂停综合征 D. 夜惊 E. 梦魇 [单选题]在屋顶以及其他危险的边沿进行工作，临空一面应装设（ ）或防护栏杆，否则，作业人员应使用安全带。
A.A-警示牌 B.B-临时围栏 C.C-安全网 D.D-常设围栏 [单选题]共发射极电流放大倍数为( )。 __________
A. 集电极电流与基极电流之比 B. 发射极电流与基极电流之比 C. 集电极电流与发射极电流之比 D. 基极电流与集电极电流之比 我来回答: 提交
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