A. a large convex lens with short focal length
B. a large convex lens with long focal length
C. a large concave lens with a short focal length
D. None of above
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A. A
B. B12
C. C
D. D
A. relative terms
B. absolute terms
C. negative terms
D. positive terms
A. it has relatively uniform expansion
B. it is opaque and so is easily visible in glass
C. it does not wet or stick to the glass
D. it remains liquid at ordinary temperatures
E. All of above
A. C
B. A
C. B
D. D
A. study of mountain tops
B. study of wool or cotton tops
C. study of top leaderships
D. branch of mathematics
A. Thomas Edision
B. Alexander Graham Bell
C. D.W. Griffith
D. Albert Einstein
A. the latest variety of improved wheat seed
B. a lightless star which has collapsed after it Hydrogen supply has been used up
C. new breed of white bulls
D. the White rulers in East Africa
A. a plant
B. an animal
C. a chemical
D. an insect
