大学英语2For nearly a century before there was such a thing as a

大学英语2
For nearly a century before there was such a thing as a space program,a view of space was possible.People could see detailed views of the Moon,explore Mars,and study the geometric beauty of Saturn’s rings.All of this was made possible by a small group of artist-astronomers who made a career of illustrating how other worlds in space might look.
Lucien Rudaux,a French artist,was the first to combine his artistic talents with his knowledge of astronomy.His paintings show a mixture of skilled observations,brilliant imagination,and painstaking attention to detail.As a result,many of his works have come surprisingly close to actual conditions on distant planets.His painting of Mars included moonlike craters that were first photographed by the Mariner 4 Probe in 1965.His 1830 painting of a dust storm looks remarkably like a photograph of a storm taken by Orbiter 2 in 1976.
The artist-astronomers,including Rudaux,stimulated interest in outer space by painting what eventually turned out to be precise portraits of the planets.
16.What is the main idea of the passage?
A) The amazing accuracy of space artists.
B) The popular success of Lucien Rudaux..
C) The imaginations of great artists.
D) The similarities of the Moon to Mars.
17.For how many years have people been able to see paintings showing the
appearance of other planets?
A) Nearly five years.
B) About fifteen years.
C) About fifty years.
D) Almost a hundred years.
18.According to the passage,artist-astronomers spent their lives ____.
A) exploring the planets
B) studying geometry
C) creating images of space
D) producing rockets for space travel
19.According to the passage,the works of Lucien Rudaux represent a
combination of ____.
A) astronomy and mathematics
B) generalizations and specifics
C) photography and illustration
D) fact and fiction
20.According to the passage,what did Mariner 4 photograph?
A) A space probe.
B) The planet Mars.
C) Craters on the Moon.
D) Lucien Rudaux’s paintings.

16.A
17.D
18.C
19.D
20.B