第24题: [单项选择]()不是电力电缆起火原因。 A. 绝缘损坏短路 B. 负载过轻 C. 中间接头盒绝缘击穿 D. 电缆闪络着火 参考答案:B
第25题: [单项选择]What was the most probable cause of the air crash A. Mechanical Failure. B. Marijuana burning. C. Destroyed by gunfire. D. Heavy fog. 参考答案:A 答案解析:[听力原文]21-22
A small US plane carrying a half ton of marijuana burnt after crashing in Sinaloa, M