资金时间价值是客观存在的，项目经济评价的核心技术是( )。
A．效益 B．折现 C．风险 D．资金
参考答案：B
按课文内容填空，一空一词。
1. We're using a new textbook and Ms Shen's method of teaching is ______ _______ ______ ______ the
teachers at my Junior High School.
2. I don't think I _______ _______ _______ in Ms Shen's class.
3. However, there are some things _______ ________ _______ ________ ______ _______.
4. For example, he or she must plan his or her lessons carefully and must explain things clearly. _____
______, students will have problems.
5. I _____ ______ _______ ________ ______with my class to the zoo in Beijing.
绝缘电阻合格，带电部分与可触及导体之间的绝缘电阻Ⅰ类设备、Ⅱ类设备分别不低于( )。
A．2MΩ、5MΩ B．2MΩ、7MΩC．5MΩ、7MΩ D．5MΩ、10MΩ
