写出下列词语的反义词。
仔细─____ 普通─____
快活─____ 经常─____
1kW•h的电能可供一只“220V 5W”的节能灯正常发光____ h.
已知f1(x)=sinx+cosx,记f2(x)=f1′(x),f3(x)=f2′(x)fn(x)=fn﹣1′(x)(n∈N*,n≥2),f1π4+f2π4+f3π4+f2013π4=( )
My father is a policeman. He in that station since 2008.