第10题: [单项选择]Passage Three Questions 32 to 35 are based on the passage you have just heard. A. A study of the Chicago-based Market Research Corporation. B. One of the essentials for life. C. Latest figures of people who don’t eat breakfast. D. Breakfast and human health. 参考答案:D 答案解析:[听力原文]32-35 (32) Breakfast plays an important part in our dally life, and it supplies a certa
第18题: [单项选择]在同一爆破网路中采用同一批号雷管是为了()。 A. 避免早爆事故 B. 避免拒爆事故 C. 预防杂散电流 D. 避免网路电阻过大 参考答案:B 答案解析:爆破事故分为早爆事故、拒爆(盲炮、瞎炮)事故。引起早爆的原因包括:杂散电流、静电感应、雷电和射频感应等。而产生拒爆的原因包括雷管因素、起爆电源或电爆网路因素、炸药是否受潮或超期变质,以及爆破施工因素等