During the introductory period of the B747 alone, about 4,000 pages had to be replaced or added to the manual each month.
答案解析
解析：
**题干分析：**
“During the introductory period of the B747 alone, about 4,000 pages had to be replaced or added to the manual each month.”
- 这句话的意思是：在B747刚引进的阶段，每个月大约需要替换或增加4000页到手册中。
**选项分析：**
- **A选项**：“仅B747刚引进时期，每个月就有4000页必须从手册中删减或增加进手册。”
- 这个选项的翻译有误，原句中并没有提到“删减”，而是“替换或增加”。因此，A选项不正确。
- **B选项**：“在B747引进时期，仅每个月必须替换或增补的手册就有4000页以上。”
- 这个选项的“4000页以上”与原句的“about 4,000 pages”不符，原句中并没有提到“以上”的意思。因此，B选项也不正确。
- **C选项**：“在B747刚引进的阶段，仅一个月就需要更换或增加约4000页到手册中。”
- 这个选项准确地传达了原句的意思，提到“刚引进的阶段”、“一个月”、“更换或增加”和“约4000页”，与原句的内容完全一致。因此，C选项是正确的。
**总结：**
正确答案是C，因为它准确地反映了原句的意思，而其他选项则存在翻译错误或信息不准确的情况。
**联想与例子：**
想象一下，当一款新型飞机（如B747）刚刚投入使用时，飞行手册需要不断更新，以确保飞行员和机组人员掌握最新的操作规程和安全信息。这就像是一本正在写作的书，每个月都有新的章节和内容加入，确保读者（在这里是飞行员）能够获取最新的信息。
例如，假设你在学习一门新课程，老师每个月都会更新教材，增加新的知识点和案例。刚开始的时候，可能每个月都会有很多新内容需要学习和掌握，这样才能跟上课程的进度。这个过程就像B747的手册更新一样，都是为了确保使用者能够获得最新、最准确的信息。
相关知识点：
B747引进期手册页数记
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