听力原文：W: Why didn't you come here yesterday, John？
M: I'm sorry, sir. My mother was ill.
What can we learn from the dialogue？
A. John was expected to come yesterday.
B. John didn't come because he was ill.
C. The man was John's father.
确立业主和物业管理企业在物业管理活动中的权利义务的法律依据是()。
A. 物业服务合同
B. 物业管理委托合同
C. 建筑物区分所有权
D. 物业管理法规、政策
【B9】
A. among
B. between
C. under
D. amount
居住区技术经济指标中反映基本数据和习惯上要直接引用的数据为()。
A. 必要指标
B. 可选用指标
C. 基本指标
D. 直接指标
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