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【单选题】
Most people usually traveled by ship and train which are driven by steam engine. It played an important part in many kinds of vehicles several scores of years ago. Who invented steam engine and what units could be used to measure the power of engine?  The word “horse-power” was first used two hundred years ago. James Watt from a worker’s family made the world first widely used steam engine. At first, he couldn’t tell people how powerful it was, because there were no units at that time. Watt decided to find out how much work one strong horse could do in one minute. He named that unit one horse-power. In this way he could measure the work of his steam engine.  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 horse-power engine.Watt wanted to find a way to ____.
A.
measure the work his engine could do
B.
tell people how powerful his engine was
C.
lift a 3300-pound weight
D.
both A and B
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参考答案:
举一反三
【判断题】李白诗作《月下独酌》中“对影成三人”指的是诗人、月亮和影子( )
A.
正确
B.
错误
【简答题】完型填空。 He lost his arms in an accident that caused the death of his father. Then his 1 became his shadow, never leaving him alone for years. 2 writing with his toes, he was completely unable to do anyt...
【简答题】,对影成三人。《月下独酌》(唐)李白
【简答题】放大电路输出信号的能量来自 。
【单选题】Your handwriting has a ( ) style. and I can recognize it at once.
A.
unique
B.
common
C.
sharp
D.
beneficial
【单选题】What did his parents do after he lost his arms?
A.
They gave up on him.
B.
They encourged him to learn to take care of himself.
C.
They did everthing for him to take good care of him
【单选题】What did his parents do after he lost his arms?
A.
They gave up on him.
B.
They encouraged him to learn to take care of himself.
C.
They did everything for him to take good care of him.
【简答题】He waved his arms . (expand)
【单选题】I can’t __________ your name, but can recognize your face.
A.
recall
B.
v isible
C.
recognize
D.
efficient
【单选题】“举杯邀明月,对影成三人。”出自李白哪部作品
A.
《独坐敬亭山》
B.
《月下独酌》
C.
《把酒问月》
D.
《金陵酒肆留别》
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