下列不属于生命现象的是[ ]
A.蜻蜓点水
B.钢铁生锈
C.公鸡打鸣
D.葵花向阳
答案:B
It's too cold here in winter. People have to wear _______ clothes. [ ]
A. warm
B. new
C. beautiful
D. expensive
SF6断路器的每日巡视检查中应定时记录()。
A.气体压力
B.气体含水量
C.气体温度
D.气体纯净度