单项选择题

Technical documents shall be supplied with three blueprints and in three copies.

A) 技术文件应附上三张蓝图，并一式三份。
B) 三张蓝图和三份复印本应附在技术文件后。
C) 技术文件应附在三张蓝图，并备份三张。
D) 技术文件应提供三张蓝图、并备三份。
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