若用紫砂壶冲泡大红袍,投茶量以壶内二分之一为度。( )
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What is the main topic of the video?
According to the news about the flood in Hunan and Jiangxi, how many people were killed in the disaster?
According to the news about the flood in Hunan and Jiangxi, what were brought to those whose home were lost?
According to the speaker, what do English listening materials include?