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问题 判断题

当电焊机的导线绝缘受损或断股时，应立即更换。( )

答案

参考答案：对

问答题 简答题

对阀门的操作有哪些要求？
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单项选择题

The duty-paying value shall be ______.

A. the value of imports or exports declared by the consignors or consignees
B. the true transaction value of imports & exports
C. the value higher than the transaction value of identical or similar goods
D. the value lower than the transaction value of identical or similar goods
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