【单选题】The buyer complained that the goods were ( ) before shipment.
【单选题】有饮“转转酒”和“杆杆酒”习俗的是( )。
【简答题】液压式离合器操纵机构主要由_________、_________和离合器工作缸(又称分泵)组成。
【简答题】The covering L/C must reach the sellers 30 days before shipment.
【单选题】the buyer complaineD、that the goods were ( )before shipment.
【判断题】福尔哈德法返滴定Cl - 时,为了避免AgCl沉淀转化为溶解度更小的AgSCN,通常采用两种方法。一是过滤分离出AgCl,然后再滴定。二是加入有机溶剂如硝基苯,用力摇动,使AgCl沉淀表面覆盖一层有机溶剂,阻止NH 4 SCN与AgCl发生转化反应。( )
【多选题】关于存在与思维关系,以下理解错误的是()