英语,Passage 1The word horsepower was first used two hundred y

英语,
Passage 1
The word horsepower was first used two hundred years ago.James Watt had made the world’s first widely used steam engine.He had no way of telling people exactly how powerful it was,for at that time there were no units for measuring power.
Watt decided to find out how much work one strong horse could do in one munite.He called that unit one horsepower.With this unit he could measure the work his steam engine could do.
He discovered that a horse could lift a 3300-pound weight 10 feet into the air in one minute.His engine could lift a 3300-pound weight 100 feet in one minute.
Because his engine did ten times as much work as the horse,Watt called it a ten horsepower engine.
51.The selection says that Watt made the first__________.
A.engine B.steam engine
C.widely used steam engine D.useful engine
52.Watt wanted to find a way to__________.
A.measure the work his engine could do
B.tell people how his engine could do
C.lift a 3300-pound weight.
D.Both A and B
53.He made up a unit of measurement based on the strength of __________.
A.a man B.ten horses C.his engine D.a horse
54.One horsepower would equal the __________.
A.work a horse could do in minute.
B.Weight a horse could lift.
C.Work a horse could do in ten minutes
D.Weight of one horse
55.The best title for this selection is__________.
A.Watt’s Engine B.The Origin of the Term Horsepower.
C.Units of Measurement D.It Happened 200 Years Ago.

51.
C. widely used steam engine
52.
D. Both A and B
53.
a horse
54.
A. work a horse could do in minute.
55.
B. The Origin of the Term Horsepower.