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单选题
空速可提高操作安全性，应作为常规程序章节的序言。
A
To improve the safety operations, airspeeds shall be a preface to the Normal Procedures Section.
B
The airspeeds shall be provided as an introduction to enhance the safety operations.
C
The airspeeds which may enhance the safety of operations shall be provided as a preface to the Normal Procedures Section.
答案解析
正确答案：C
相关知识点：
空速作常规程序序言提安全性
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