题目

本初子午线是(     ) A．东西两半球的分界 B．东经与西经的分界 C．计算纬度的起始线 D．欧亚两洲的分界 答案：B．When we have some problems in our mind, we had better ask the psychologist for help. Here "psychologist" means __________ in Chinese.外科医生 B. 生物学家 C. 物理学家 D. 心理学家