正确答案:

题目：联邦止咳露属于镇咳药

解析：√

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学习资料的答案和解析：

[单选题]If a refrigeration system were short of refrigerant, the condition would result in

continuous running of the compressor

[单选题]下列哪些船舶应保持正规的瞭望？________。

以上均应保持正规瞭望