第9题: [单项选择]{{I}}Questions 18~21 are based on the following dialogue.{{/I}}Why does the woman have problems getting the book from the library A. It wasn’t published recently. B. It is in great demand. C. It was sold out already. D. It isn’t owned by the library. 参考答案:B
第14题: [单项选择]关于双代号时标网络计划,下述说法中错误的是( )。 A. 自终点至起点不出现波形线的路线是关键路线 B. 双代号时标网络计划中表示虚工作的箭线有可能出现波形线 C. 每条箭线的末端(箭头)所对应的时标就是该工作的最迟完成时间 D. 每条箭线的箭尾所对应的时标就是该工作的最早开始时间 参考答案:C