6．經濟合同的前言一般包括簽定合同的目的或簽定合同的(      )
A.姓名                                                        B.依據
C.主要條款                                                 D.次要條款
7．產品說明書是__________向消費者說明，介紹產品的書面材料。(      )
A.權威部門                                                 B.決策部門
C.生產部門                                                 D.主管部門
8．商品廣告的主體一般包括提供商品或服務的(      )
A.信息                                                        B.對象
C.要求                                                        D.特征
9．感謝信的對象確定，具有(      )
A.個體性                                                    B.針對性
C.抒情性                                                    D.全體性
10.請柬作為公關禮儀的媒介，一般不保密，具有(      )
A.普遍性                                                    B.公開性
C.通用性                                                    D.傳播性