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问题 判断题

由于仪器设备缺陷，操作者不按操作规程进行操作。以及环境等的影响均可引起系统误差。

答案

参考答案：错

选择题
In Western culture, 21 was the age _____ young people traditionally received a key to their parents' door, as a symbol of entering adulthood.
A. in which
B. on which
C. at which
D. to which
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单项选择题

物业管理人员在物业管理过程中处理复杂的问题时，首先应该依据的是( )。

A．丰富的经验

B．领导的意见

C．《物业管理条例》

D．业主的意见
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