不定项选择

“公共关系的运用是一种艺术”这种说法是错误的

A．正确
B．错误

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单项选择题

皮内注射是将药药液注入: A.
表皮 B.
真皮 C.
皮下组织 D.
表皮与真皮间 E.
真皮与表皮下组织间

A quote from an expert in the field is an excellent way to backup your claim, and you have to make sure that your source truly is an expert in a field that relates to your topic.
A、正确
B、错误

答案：正确