Which of the following statements is NOT mentioned in the passage as a typical feature of folk song
A. It is constantly changing over time.
B. It appeals to many people.
C. It contains complex musical structures.
D. It is passed on to other people by being performed.
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建设单位领取了施工许可证后因故不能按期开工的,应当向发证机关申请延期,延期以()为限。
A. 1次
B. 2次
C. 3次
D. 4次
下列合同中,( )性质上属于实践性合同。
A. 动产质押合同
B. 赠与合同
C. 承揽合同
D. 供电合同
根据《合同法》的规定,无权代理人订立的合同,属于( )。
A. 自动失效合同
B. 无效合同
C. 可变更、可撤销合同
D. 效力待定合同
房屋按结构形式分类,钢筋混凝土墙承重的结构称为()。
A. 混合结构
B. 框架结构
C. 排架结构
D. 剪力墙结构