英语大神来做下阅读理解,

英语大神来做下阅读理解,
The word horsepower was first usedtwo hundred years ago.James Watt had made the first
widely used steam engine.He had no way of telling people exactly howpowerful it was,for at
that time there were no units for measuring power.
Wattdecided to find out how much work one strong horse could do in one minute.Hecalled that
unit one horsepower.With this unit he could measure the work his steamengine could do.
He discovered that a horse could lift a3,300-pound weight 10 feet into the air in one minute.
His engine could lift a 3,300-pound weight 100feet in one minute.
Becausehis engine did ten times as much work as the horse,Watt called it a ten horsepower engine.
16.The theme of the passage is ___________.
A.how Watt made the world’s first widely used steam engine
B.Watt discovered the units of measurement
C.weight of a horse
D.work a horse could do in a minute
18.Watt made up a unit of measurement based on the strengthof_________.
A.a horsepower B.10 feet
C.3,300-pound D.a horse
19.Watt wanted to find a way to________________.
A.lift a 3,300-pound weight
B.use the world’s first widely used steam engine
C.measure the work his engine could do
D.discover the weight a man could lift

17 A 18 A 19 C