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(This passage was written prior to 1950) We now know that what constitutes practically all of matter is empty spa
(This passage was written prior to 1950) We now know that what constitutes practically all of matter is empty spa
admin
2012-01-15
99
问题
(This passage was written prior to 1950)
We now know that what constitutes practically
all of matter is empty space; relatively enormous
voids in which revolve with lightning velocity
Line infinitesimal particles so utterly small that they
(5) have never been seen or photographed. The exis-
tence of these particles has been demonstrated by
mathematical physicists and their operations
determined by ingenious laboratory experiments.
It was not until 1911 that experiments by Sir
(10) Ernest Rutherford revealed the architecture of the
mysterious atom. Moseley, Bohr, Fermi, Millikan,
Compton, Urey, and others have also worked on
the problem.
Matter is composed of molecules whose aver-
(15) age diameter is about 1/125 millionth of an inch.
Molecules are composed of atoms so small that
about 5 million could be placed in a row on the
period at the end of this sentence. Long thought
to be the ultimate, indivisible constituent of mat-
(20) ter, the atom has been found to consist roughly of
a proton, the positive electrical element in the
atomic nucleus, surrounded by electrons, the
negative electric elements swirling about the
proton.
Which of the following relationships most closely parallels the relationship between the proton and the electrons described in the passage?
选项
A、A hawk to its prey
B、A blueprint to a framework
C、A planet to its satellites
D、A magnet to iron filings
E、A compound to its elements
答案
C
解析
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本试题收录于:
GRE VERBAL题库GRE分类
0
GRE VERBAL
GRE
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