刑罚中的主刑可单独适用，也可以附加适用。( )
参考答案：错
解析： 刑罚中的主刑只能单独适用，不能附加适用。附加刑既可单独适用，也可附加适用。
压力蒸气灭菌时物品的装载错误的是（）
A.尽量将同类物品放在一起灭菌
B.物品的上下左右均应间隔一定距离
C.难灭菌的大包放上层，易灭菌的小包放下层
D.金属物品放下层，织物包放上层
E.玻璃瓶等开口向上或侧放
The President was talking to all the department heads while a group of unexpected important clients had arrived for a talk with him.
A．when ... were arriving
B．as ... had arrived
C．when ... arriving
D．when ... arrived
