單項選擇題
A.500~800 B.300~500 C.100 D.30~100
A.70 B.100 C.150 D.200
A.±10〞 B.±14〞 C.±60〞 D.±90〞
A.1/10000 B.1/8000 C.1/6000 D.1/4000
A.1/8000 B.1/6000 C.1/3000 D.1/2000
A.1/1500 B.1/2000 C.1/6000 D.1/8000