加工中心与普通机床相比，最主要的区别是加工中心具有( )的功能。
A．物流管理 B．刀库，能自动换刀C．自动装卸工件 D．自动排屑
参考答案：B
Which of the following is not one of the responsibilities of the Tariff Commission
A．To formulate the guideline for drawing up the regulations
B．To set temporary tariff rates
C．To levy Customs tariffs on imports & exports
D．To examine the draft of the amendment to tariff
