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refractive index
n.
1.the ratio of the velocity of light in a vacuum to that in a medium
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refractive
refraction
refracting telescope
refractile
refract
reformulate
reformist
reformism
reformer
reformed
English Test
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refractiveness
refractivity
refractometer
refractoriness
refractory
refractory anaemia
refractory anemia
refractory period
refractory pot
refractory-lined
English Grammar Test
English Grammar Test is an application to help you enhance your English expertise.
sensitive plant
morbidness
cashable
echocardiogram
ammotragus
dead person
gather up
stage crew
american white oak
academic costume
Idiom of the Day
make an impression (on someone)
to produce a strong or memorable effect on someone
The elderly man made an impression on me and I was sad when I heard that he had died.
1.
Let ________ dogs lie.
a.
sleeping
b.
snoozing
c.
dreaming
d.
barking
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Fact
Back in the mid to late 80s, an IBM compatible computer wasn't considered 100% compatible unless it could run Microsoft's Flight Simulator.
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