某项目有甲、乙两个建设方案,基准收益率ic=10%,两方案的净现值等有关指标如下表所示。已知(P/A,10%,6)=4.355、(P/A,10%,10)=6.145,则两方案可采用( )。 方案 寿命期(年) 净现值(万元) 内部收益率(%) 甲 6 100 14.2% 乙 10 130 13.2%
A. 净现值法进行比选,且乙方案更佳
B. 内部收益率法进行比选,且甲方案更佳
C. 研究期法进行比选,且乙方案更佳
D. 年值法进行比选,且甲方案更佳
查看答案
简答题 某低压配电室内,成排配电柜的前后通道间距过小、出口位置不合理、采暖系统采用丝扣连接、配电室上层是多水场所等,影响配电系统的正常运行,给维修带来不便,造成不安全的隐患。 为防止上述现象发生,应采取哪些防护措施
三相变压器的基本原理和单相变压器的原理是不一样的。( )
A. 对
B. 错
压气式高压复合开关的特点是压气活塞与动触头联动,压缩空气吹弧,开断能力较强,能频繁操作,但断口电压较低。( )
A. 对
B. 错
[听力原文]8-10M: It’ s a beautiful day, isn’ t itW: Yes, nice and sunny.M: It’s much better than last week. It was too warm then.W: I’m glad summer is over. I like autumn best.M: So do I. It’s neither too hot nor too cold. The sky is clear and blue.W: It’s a good time to have a picnic. Do you want to have one this weekendM: I’d love to, but I think it’s going to rain.The weatherman said it will.W: I don’t think he’s right. It hasn’t rained for a week.M: But he is usually right in his weather news.W: I’m sure we’ll have fine weather for our picnic. What does the woman think the weather will be like this weekend()
A. She thinks it’ll rain.
B. She doesn’t think it’ll rain.
C. She thinks it’ll be cloudy.
D. She doesn’t think it’ll be fine.