第2题: [单项选择]下列说法中正确的为( )。 A. 采暖管道的材质,应根据采暖热媒的性质、管道敷设方式选用,并应符合国家现行有关产品标准的规定 B. 采暖管道的材质,应根据采暖系统的形式选用,并应符合国家现行有关产品标准的规定 C. 采暖管道的材质,应根据散热设备的类型选用,并应符合国家现行有关产品标准的规定 D. 采暖管道的材质,应根据散热设备的材质选用,并应符合国家现行有关产品标准的规定 参考答案:A
第21题: [单项选择]{{B}}Section A{{/B}}
{{B}} Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. David is going to fly to New York. B. David will stay in New York. C. David went to Iraq the other day. D. David is going to leave for Iraq next week. 参考答案:D 答案解析:[听力原文]
W: I met David the other day in New York. He doesn’t know when he is leaving the country.