11. In the first paragraph, the author describes objects in the universe in terms of their
(A) color
(B) origin
(C) location
(D) shape
12. Which of the following is the best representation of the clouds of radio emission described in the first paragraph?
(A) (图)
(B) (图)
(C) (图)
(D) (图)
13. According to the passage, scientists do not fully understand why double radio sources
(A) have not eventually disappeared
(B) cannot be observed with a telescope
(C) are beginning to slow down
(D) are not as big as some planets and stars
14. The word "their" in line 22 refers to
(A) speeds
(B) directions
(C) electrons
(D) clouds
15. According to the passage, what happens when electrons and gas collide in space?
(A) The gas becomes more condensed
(B) The gas becomes less radiated
(C) The electrons disperse
(D) The electrons become negatively charged
16. The author suggests that astronomers consider the study of cosmic jets to be
(A) an obsolete scientific field
(B) an unprofitable venture
(C) an intriguing challenge
(D) a subjective debate
17. In what lines does the passage compare the size of double radio sources with that of other galaxies?
(A) Lines 4-6
(B) Lines 12-14
(C) Lines 19-20
(D) Lines 23-24
18. Where in the passage does the author mention a technology that aided in the understanding of double radio sources?
(A) Line 2
(B) Line 7
(C) Line 17
(D) Line 21
19. The paragraph following the passage most likely discusses
(A) specific double radio sources
(B) an explanation of the synchrotron process
(C) possible reasons for the presence of cosmic jets
(D) the discovery of the first double radio sources.
Questions 20-28
The sculptural legacy that the new United States inherited
from its colonial predecessors was far from a rich one, and
in fact, in 1776 sculpture as an art form was still in the hands
of artisans and craftspeople. Stone carvers engraved their motifs
of skulls and crossbones and other religious icons of death
into the gray slabs that we still see standing today in old burial
grounds. Some skilled craftspeople made intricately carved
wooden ornamentations for furniture or architectural decorations,
while others caved wooden shop signs and ships’ figureheads.
Although they often achieved expression and formal excellence
in their generally primitive style, they remained artisans
skilled in the craft of carving and constituted a group distinct
from what we normally think of as "sculptors" in today’s
use of the word.