开行旅游列车必须使用25B型以上客车。（部竞赛题）
参考答案：对
In this university a medal with five thousand dollars _____ achieved success in science and technology every
two years. [ ]
A. is given to no matter who
B. is given to whoever
C. are given to anyone who
D. gives to whomever
避雷器的接地电阻值应不大于（）欧。
A、5
B、10
C、15
D、20
