食品中有害金属的污染主要是指镉、铅、()、砷对食品造成的污染
参考答案:汞
The quality of the above mentioned goods were in conformity ( ) the requirement of the contract No. JBD-089.
A.withB.inC.underD.of
用做冷冲模凹模的常用钢材是()。
A、铜板材
B、铝板材
C、球墨铸铁板材
D、合金钢材