单项选择题

（） includes obvious symbols or words to warn people against the hidden danger of inflammables, explosives and poisonous products.

A、Transport marks
B、Directive marks
C、Warning marks
D、Other marks

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单项选择题
【多选题】内部员工推荐包括（）
A、推荐企业内部其他部门员工
B、员工推荐企业外部其他人
C、合作伙伴介绍
D、行业协会介绍
问答题
8. Because of its great popularity, the book has been translated into several languages for ____(出版).
答案：publication完整句子：Because of its great popularity, the book ha...