食品的综合质量包括了（）等主要内容。
A.产品质量
B.工程质量
C.工作质量
D.服务质量
参考答案：A, B, C, D
胆管结石和急性胆管炎的典型症状是()
A．腹痛、腹胀、昏迷
B．腹痛、呕吐、黄疸
C．腹痛、黄疸、腹泻
D．腹痛、呕吐、
E．腹痛、黄疸、寒战
If the Customs duties are short-levied on import or export goods, the Customs is entitled to collect the money payable from the person obligated to pay the duty within ( ) of the previous duty payment or the release of the item.
A．1 year
B．2 years
C．3 years
D．4 years
