Bob____ ____ ____at eight thirty every day.
—How much do I o____ you, Sir?
—Well, it's $5.50 plus tax. Thank you.
一辆轿车在某高速公路上正常行驶时的速度为 a km/h,已知该公路对轿车的限速为100km/h,那么 a 满足的不等关系应表示为( )
图中,表1,表2是两只电表,表1.表2应分别是( )