When a light is first seen on the horizon it will disappear again if the height of eye is
A.Checking a light
B.Raising a light
C.Obscuring a light
D.Bobbing a light
A.Checking a light
B.Raising a light
C.Obscuring a light
D.Bobbing a light
A.there is no fuel left in it
B.its outer layer goes into space firs
C.a huge explosion will happen
D.it doesn't give off light any longer
A.She was the first woman to lead a big U.S.publishing company.
B.She got her first job as a teacher at theUniversity of Chicago.
C.She committed suicide because of her mentaldisorder.
D.She took over her fathers position when hedied.
What is an efficiency wage? Why is it profitable for the firm to pay an efficiency wage when workers have better information about their productivity than firs do?
Please remember (turn) ______ off the light when you leave.
How do you know that the oil pressure is a bit low?
A.The warning light flashes only when the car runs at fast speed.
B.The warning light flashes only when the car is slowing down.
C.The warning light flashes continuously.
D.The warning light flashes when the engine idles.
A.presupposes
B.entails
C.contradicts
D.includes
During the day people can see light everywhere,because when the sun is up__________ .
A.it gives off light
B.it absorbs light
C.the earth’s atmosphere gives off light
D.the earth’s atmosphere absorbs sunlight
Some crystals emit visible light when ______ by ionizing particles.
A.burned
B.struck
C.excited
D.inspired
A.light
B.roomy
C.cluttered
D.comfortable
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