2.The discovery of the antibiotic penicillin in 1928 has not produced antibiotics
A B
useful for the treatment of infectious diseases until 1940.
C D
选B
11.The lenses in an optical microscope bend the light passing through a specimen to form an image of that specimen that is much larger ______ actually viewed.
(A) than it
(B) than the one
(C) one than
(D) than one which
选B
12.Gordon parks composed, wrote, and directed Martin, the classical ballet who
A B C
examines the meaning of the life of Martin luther King, Jr.
D
选C
17.Experiments related to the sense of smell are more easily _______than those related to perception of color.
(A) setting them up
(B) to set up
(C) set up
(D) sets up those
选C
25.________ungerstanding of weather and its variability, it has been difficult to prove that weather can be controlled.
(A) since incomplete
(B) Because of incomplete
(C) Incomplete
(D) What is incomplete
选B
38.During the pre-Revolutionary period, the press in Britain’s North American
A
colonies was subject to licensing laws similar to them of Great Britain itself.
B C D
选D
39.The celesta, an orchestral percussion instrument, resembles___________
(A) a small upright piano
(B) how a small upright piano
(C) a small upright piano is
(D) as a small upright piano
选B
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