第13题: [单项选择]重大事故的调查期限为()日。 A. 10 B. 20 C. 30 D. 40 参考答案:C
第14题: [填空题]Most of the top performers’ parents are outstanding musicians, athletes or scholars. 参考答案:N 答案解析:[定位] 由题干关键词parents 定位到第一个小标题下最后一段。
[解析] 其中倒数第二句指出The vast majority of the parents were not themselv