第9题: [单项选择]How long was Dilys lateWhat do you know from the man’s answer A. He enjoys writing home every week. B. He never writes home once a week. C. He doesn’t write home once a week now. 参考答案:C 答案解析:[听力原文] W: How often did you write home M: I used to write home once a week.
第23题: [单项选择]关于时标网络计划中关键线路的说法不正确的是( )。 A. 凡自始至终不出现波形线的线路为关键线路 B. 关键线路上相邻两项工作之间的时间间隔全部为。 C. 在计算工期等于计划工期的前提下,自由时差和总时差全部为。 D. 在计算工期等于计划工期的前提下,总时差小于自由时差 参考答案:D