暗龙骨吊顶工程在施工前,应按设计要求对房间的净高、洞口标高和吊顶内的管道、设备及其支架的标高进行交接检验。( )
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铝合金装饰条板安装用铝合金条板装饰墙面时,可用螺钉直接固定在结构层上,但不可用锚固件悬挂或嵌卡的方法,将板固定在轻钢龙骨上。( )
A. 对
B. 错
活动隔墙安装后应当能重复及动态使用,同时应当保证使用的安全性和灵活性。( )
A. 对
B. 错
发达国家机器大生产得到了飞速发展,物质极大丰富,因此,在这些国家中就可以实现人的全面发展。
Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Now, listen to the passage. Where did children in the earliest times learn how to survive
A. In schools.
B. From the nature.
C. From their experience.
D. From their parents.