A. It requires formal training. B. It is often enjoyed by those with strong analytical ability. C. It is disliked by blacks. D. It is more difficult to learn than classical music. 参考答案:A 答案解析:推理题 选项A是基于第四段第一句所作出的合理判断。第四段第一句谈到黑人在不需要正规训练的音乐领域脱颖而出，例如，黑人多擅长流行音乐、钢琴和蓝调，而不是古典音乐，小提琴和歌剧，可见歌剧属于需要正规训练的
第18题: [单项选择]Had Michelle not anticipated the supply shortage and put in an early order, the company surely ______ the contract. A. would have forfeited B. would forfeit C. had forfeited D. forfeits 参考答案:A 答案解析:[语法] 虚拟语气过去完成
A. personal information is more and more difficult to protect B. people are more willing to tell their information C. technology is developing so fast D. governments have more power 参考答案:A 答案解析:从文中可知，导致这一结果的根本原因在于人们越来越难以保护私人信息和资料。故选A。
第27题: [单项选择]某航线报告期末每周班次为2班，计划期夏秋航班计划增加2班，冬春航班计划减少1班，则其计划期全年飞行班次为( )。 A. 364 B. 346 C. 340 D. 352 参考答案:B 答案解析:[解析] 飞行班次=2(年初每周班次×全年周数+计划期每周增加班次×自增加日至年末周数-计划期每周减少班次×自减少日至年末周数)，在工作计划中，全年按52周算，每季按13周算，2个月按9周算，1个月按
