某工程双代号网络计划如下图所示,其中关键线路有()条。 A.4 B.3 C.2 D 发布时间:2017-12-12 23:37 │ 来源:www.tikuol.com 题型:单项选择题 问题: 某工程双代号网络计划如下图所示,其中关键线路有()条。 A.4B.3C.2D.1
题型:单项选择题 给下列问句选择适当的答语。( ) 1. Thank you! ( ) 2. How are you? ( ) 3. Good-bye! ( ) 4. What colour is it? ( ) 5. Good morning! A. Good-bye! B. Good morning. C. I'm fine. D. You're welcome. E. It's orange. 查看答案