下列误差属于粗大误差（）。
A.偶然误差
B.寄生误差
C.差错
D.疏忽误差
参考答案：B, C, D
________ we plant, __________ our city will be.
A．The more trees; the beautiful
B．The less trees; the more beautiful
C．The more trees; the more beautiful
D．The less trees; the beautiful
空分社备在正常运行时应遵守哪些安全生产要求？
