Although originally a German innovation, kindergarten got its real start in the United
A. an easy
B. a playful
C. an open
D. a better
Eiffel Is an Eyeful
Some 300 meters up, near the Eiffel Tower's wind-whipped summit the world comes to scribble. Japanese, Brazilians, Americans — they graffiti their names, loves and politics on the cold iron — transforming the most French of monuments into symbol of a world on the move.
With Paris laid out in miniature below, it seems strange that visitors would rather waste time marking their presence than admiring the view. But the graffiti also raises a question: Why, nearly 114 years after it was completed, and decades after it ceased to be the world's tallest structure, is la Tour Eiffel still so popular?
The reasons are as complex as the iron work that graces a structure some 90 stories high. But part of the answer is, no doubt, its agelessness. Regularly maintained, it should never rust away. Graffiti is regularly painted over, but the tower lives on. "Eiffel represents Paris and Paris is France. It is very symbolic," says Hugues Richard, a 31-year-old Frenchman who holds the record for cycling up to the tower's second floor — 747 steps in 19 minutes and 4 seconds, without touching the floor with his feet. "It's iron lady, it inspires us," he says.
But to what? After all, the tower doesn't have a purpose. It ceased to be the world's tallest in 1930 when the Chrysler Building went up in New York. Yes, television and radio signals are beamed from the top, and Gustave Eiffel, a frenetic builder who died on December 27, aged 91, used its height for conducting research into weather, aerodynamics and radio communication.
But in essence the tower inspires simply by being there — a bland canvas for visitors make of it what they will. To the technically minded, it's an engineering triumph. For lovers, it's romantic.
"The tower will outlast all of us, and by a long way," says Isabelle Esnous, whose company manages Eiffel Tower.
Why does the author think the Eiffel Tower is transformed into symbol of a world on the move?
A. Tourists from all over the world come to the Eiffel Tower by car or by plane.
B. Tourists of all nationalities come to scribble on the cold iron of the tower.
C. The Eiffel Tower is the tallest building in the world.
D. The Eiffel Tower represents all the towers in the world.
With regard to Ethernet media access methods, which of the following are true?
(Choose all that apply.)
A device waits for an electronic signal before transmitting.
B. A device listens and waits until the media is not busy before transmitting.
C. All devices on an Ethernet segment see data that passes on the network medium.
D. Only the sender and the receiver devices see data that passes on the network medium.
Ethernet networks allow you to configured devises with higher transmission priority.
A receiving host has failed to receive all of the segments that it should acknowledge.
What can the host do to improve the reliability of this communication session?
A. Start a new session using UDP
B. Obtain a new IP address from the DHCP server
C. Use a different source port for the session
Decrease the sequence number
E. Decrease the window size