单选题
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试题题干

() line is often inserted between the salutation and the body to call attention to the topic of the letter.

A

Attention 

B

Reference 

C

Subject 

D

Address 

参考答案

正确答案:

试题解析

Attention line:经办人行;Reference line: 参考;Subject Line:主题行;Inside Name and Address:封内名址。 主题行通常插入在称呼和正文之间,以引起人们对信的主题的注意。