第6题: [单项选择]What does ECDIS stand for?() A. Electrical Chart Display and Indication System B. Electronic Chart Display and Information system C. Electric Chart Display and Information System D. Electronic Chart Display and Indicating system 参考答案:B
第10题:[多选题]发生煤与瓦斯突出的预兆有( )。 A. 煤体深部发出响声 B. 煤层层理紊乱,煤变软;颜色变晤淡、无光泽;煤层干燥,煤尘增大 C. 煤层受挤压褶曲,煤变粉碎,厚度变大,倾角变陡 D. 压力增大,支架变形;煤壁外鼓、片帮、掉渣;顶板冒顶、断裂,底板鼓起;钻孔作业出现夹钻、顶钻 E. 瓦斯涌出异常,涌出量忽大忽小;空气气味异常、闷人;煤温或气温降低或升高 参考答案:ABCDE
第22题: [单项选择]A. He wouldn’t find a good dormitory. B. He would lose contact with his old friends. C. He would fall behind with his studies. D. He couldn’t write for a newspaper. 参考答案:C 答案解析:[解析] What did the man worry about when he was going to change universities