强调商品包装的增值功能与商品包装的经济性要求不存在互相冲突情况。
参考答案：对
After the boss had read my letter of application, he was ______ that I was the right person for the position.
A．informed
B．convinced
C．presented
D．suggested
美国医学物理学家学会（AAPM）规定加速器机架旋转等中心误差为（）
A.Φ0.2mm
B.Φ1mm
C.Φ2mm
D.Φ3mm
E.Φ4mm
