【单选题】定期船运的"四固定"是指( )比较固定。
【单选题】三相交流电:three-() alternating current
【单选题】There was a _____ rain yesterday evening. It rained ________.
【简答题】The rain was heavy; (consequence) ______, the land was flooded.
【简答题】The rain was heavy and _____ the land was flooded. A. consequently B. constantly C. continuously D. consistently
【单选题】每秒内正弦量变化的次数称为频率,用f表示,单位是( )。
【单选题】______, the workers continued their work in the open.
【简答题】The rain was heavy and ______ (consequence) the land was flooded.
【单选题】每秒内正弦量变化的次数称为频率,用f表示,单位是什么。
【单选题】“独学而无友,则孤陋而寡闻”, 是说大学学习,不仅要自己潜心苦学,也需要相互沟通、交流。这是讲的( )。