[单项选择]消防联动控制设备在接到已确认的火灾报警信号后,应在多久内发出联动控制信号,按有关逻辑关系联动一系列相关设备发生动作,最长时间不得超过多久()。 A. 3s,30s B. 5s,30s C. 3s,50s D. 5s,50s
参考答案:A
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第1题: [单项选择]What does the girl mean A. She doesn’t think the skirt beautiful. B. She doesn’t want to buy the skirt. C. She also likes the skirt. 参考答案:A 答案解析:[听力原文] M: What a beautiful skirt! W: Do you really think so