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单选题 请根据听力内容完成相应选项选择小题:<iframe src="/ananas/common-modules/audioplay/audioplay.html?objectid=c7a357243e1942c4a3042e4e2a0e0613"></iframe>
A. Smoke signals will be used to communicate
B. Light signals will be used to communicate
C. Whistles will be used to communicate
D. Flag signals will be used to communicate

学科:默认课程
时间:2025-10-29 02:06:39
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