【单选题】The bag is ____ as the red one.
【单选题】离心泵的工作点是管道特性曲线与离心泵的()曲线的交点。
【判断题】药品销售人员不得向证照不全,非法药品生产、经营单位销售药品。
【单选题】This bag is _____ than that one. [ ]
【单选题】The policeman is helping the old woman __________ a heavy bag on her back.
【判断题】离心泵的工作点是管路特性曲线与离心泵的特性曲线的交点。