第5题: [单项选择]A. Later colonists did not know how to thatch. B. Thatching was considered dangerous. C. Other roofing materials were available. D. Thatching was unsuitable for the climate. 参考答案:C 答案解析:[听力原文] According to the speaker, why did thatching die out in the United States
第24题: [多项选择]广播电视中心程中,对演播室的声学处理应满足()要求。 A. 混响时间短 B. 频率特性平直 C. 音色柔和 D. 隔声效果好 E. 没有声学缺陷 参考答案:A, B, D, E 答案解析:广播电视中心程中,对演播室的声学处理应满足混响时间短、频率特性平直、隔声效果好、没有声学缺陷等要求。