| More than a year has passed since the
space shuttle Columbia broke into pieces over central Texas. This past January
President Bush announced a long-term program of space exploration that would
return human beings to the Moon, and thereafter send them to Mars and beyond. As
this magazine (Natural History) goes to press, the twin Mars Exploration Rovers,
Spirit and Opportunity, are wowing the scientists and engineers at the rovers’
birthplace--NASA’s Jet Propulsion Laboratory (JPL)--with their skills as robotic
field geologists. JPL’s official rover Web site is being stampeded by visitors.
The confluence of these and other events resurrects a perennial debate: with two
shuttle failures out of 112 missions, and the astronomical expense of the manned
space program, can sending people into space be justified, or should robots do
the jo A. hacked severely B. clicked frequently C. closed forever D. neglected purposely [单项选择]More than a year has passed since the space shuttle Columbia broke into pieces over central Texas. This past January President Bush announced a long-term program of space exploration that would return human beings to the Moon, and thereafter send them to Mars and beyond. As this magazine (Natural History) goes to press, the twin Mars Exploration Rovers, Spirit and Opportunity, are wowing the scientists and engineers at the rovers’ birthplace--NASA’s Jet Propulsion Laboratory (JPL)--with their skills as robotic field geologists. JPL’s official rover Web site is being stampeded by visitors. The confluence of these and other events resurrects a perennial debate: with two shuttle failures out of 112 missions, and the astronomical expense of the manned space program, can sending people into space be justified, or should robots do the job alone
Modern societies have been sending robots into space since 1957, and people since 1961. Fact is, it’s vastly cheaper to send robots: in most cas A. A．1) most probably means ______ . hacked severelyB. clicked frequentlyC. closed foreverD. neglected purposely [填空题]The book has more than one author.
[填空题]Who has owned more than 50 domain names
A. A．George W. Bush B．Kelsey Grammar C．Bonita Card. [填空题]The museum has collected more than three million objects in every known______.
[单项选择]No artist has affected modern art more than Pablo Picasso. The thousands of masterpieces he created changed the way people thought about art. Picasso was perhaps the most talented and successful artist who ever lived.
Pablo Picasso was born in 1881 in a small town on the southern coast of Spain. His father was a painter who taught art. Picasso showed exceptional talent at an early age and, by the time he was in his teens, painted better than his father or any of the local art teachers. At sixteen, Picasso was sent to the Royal Academy of Madrid, where students drew from plaster casts and copied works of the old masters. Picasso felt these assignments were pointless and began to work on his own. Picasso’s father soon became angry with his son’s rebellious behavior, long hair, and strange clothes. He believed that Picasso was wasting talent and scolded him, "Why don’t you cut your hair and paint sensibly" In 1900, Picasso left for Paris -- then the center of the art world. He A. Cubism: A Revolutionary Style in Art B. Painting in Paris C. A Rebel and His Art D. The Influence of Art 我来回答: 提交
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