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更多“ecosystem/'ɛko,sɪstəm/（）”相关的问题
Can privacy be preserved 2 bringing safety and security to a world that seems increasingly 3 ？
Last month, Howard Schmidt, the nation's cyber-czar, offered the federal government a 4 to make the Web a safer place—a "voluntary trusted identity" system that would be the high-tech 5 of a physical key, a fingerprint and a photo ID card, all rolled 6 one. The system might use a smart identity card, or a digital credential 7 to a specific computer, and would authenticate users at a range of online services.
The idea is to 8 a federation of private online identity systems. User could 9 which system to join, and only registered users whose identities have been authenticated could navigate those systems. The approach contrasts with one that would require an Internet driver's license 10 by the government.
Google and Microsoft are among companies that already have these " single sign-on" systems that make it possible for users to 11 just once but use many different services.
12 , the approach would create a " walled garden" in cyberspace, with safe " neighborhoods" and bright "streetlights" to establish a sense of a 13 community.
Mr. Schmidt described it as a "voluntary ecosystem" in which "individuals and organizations can complete online transactions with 14 , trusting the identities of each other and the identities of the infrastructure 15 which the transaction runs. " Still, the administration's plan has 16 privacy rights activists. Some applaud the approach; others are concerned. It seems clear that such a scheme is an initiative push toward what would 17 be a compulsory Internet "drive's license" mentality.
The plan has also been greeted with 18 by some computer security experts, who worry that the "voluntary ecosystem" envisioned by Mr. Schmidt would still leave much of the Internet 19 . They argue that all Internet users should be 20 to register and identify themselves, in the same way that drivers must be licensed to drive on public roads.
【B1】
A．swept
B．skipped
C．walked
D．ridden
Father Christmas often puts the presents ______.
A．into children's hats
B．into children's stocking
C．under children's beds
D．into children's shoes
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Joachim's vision is based on an idea called pleaching (编织), where tree branches are grown so that they naturally weave together. Since the growth patterns of trees are {effected; affected; attempted} by wind and sunlight, it may be possible to control the way a tree develops.
These Fabricated Tree House Habitats would use trees grown into shapes as housing. One of the {purposes; disadvantages; advantages} of these designs is that trees would not have to be cut down for lumber.
"A 100 percent treehouse would take years to create," Joachim said.{Depending on; Judging by; Protected from} the climate, a house could take anywhere from 5 to 30 years to grow. Fortunately, there's a way to speed up the process. Joachim suggests including ecological materials such as sod (草皮), grasses and living branches in the housing designs. "This material would be able to move as the house grows," Joachim said.
A home would become an actual ecosystem, a community of plants, animals, and bacteria working together. The trees would also give off water vapor that would assist in {cleaning; heating; cooling} the homes. Solar panels and wind would help provide energy. The tree homes might even have soil pockets, where plants could grow from the structure itself.
Work has already begun on Joachim's first design—a house made from 50 percent recycled and 50 percent living things. Joachim is confident about the {happiness; benefit; importance} of his work, as he uses natural products without destroying nature.
"The environment and its study are very important. We need to respect nature, don't take it for granted," he said.
