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【单选题】
下列选项中，关于施工现场塔式起重机的安全使用要点，叙述不正确的是( )。A.
起重机的轨道基础两旁、混凝土基础周围应修筑边坡和排水设施，并应与基坑保持一定安全距离
B.
采用高强度螺栓连接的结构，应使用制造的连接螺栓，自制螺栓应有质量合格的试验证明，否则不得使用
C.
配电箱应设置在轨道中部，电源电路中应装设错断相保护装置及紧急断电开关，电缆宽筒应灵活有效，不得拖缆
D.
起重机的金属结构、轨道及所有电气设备的金属外壳，应有可靠的接地装置，接地电阻应大于4Ω
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【简答题】A．They usually accept responsibility. B．They blame factors beyond their control. C．They complain about their personal problems. D．They compare their behavior. to others'.
【简答题】A．They usually accept responsibility. B．They blame factors beyond their control. C．They complain about their personal problems. D．They compare their behavior. to others.
【简答题】A．They usually accept responsibility. B．They blame factors beyond their control C．They complain about their personal problems. D．They compare their behavior. to the behavior. of others.
【简答题】A．They usually accept responsibility. B．They blame factors beyond their control. C．They complain about their personal problems. D．They compare their behavior. to others'.
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