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Text 3Vinton Cerf, known as the father of the Internet, said on Wednesday that the Web was outgrowing the planet Earth and the time had come to take the information superhighway to outer space. “The Internet is growing quickly, and we still have a lot of work to do to cover the planet.” Cerf told the first day of the annual conference of Internet Society in Geneva where more than 1500 cyberspace fans have gathered to seek answers to questions about the tangled web of the Internet. Cerf believed that it would soon be possible to send real-time science data on the Internet from a space mission orbiting another planet such as Mars. “There is now an effort under way to design and build an interplanetary Internet. The space research community is coming closer and closer and merging. We think that we will see interplanetary Internet networks that look very much like the ones we use today. We will need interplanetary gateways and there will be protocols to transmit data between these gateways, ” Cerf said. Francois Fluckiger, a scientist attending the conference from the European Particle Physics Laboratory near Geneva, was not entirely convinced, saying: “We need dreams like this. But I don’t know any Martian whom I’d like to communicate with through the Internet.” Cerf has been working with NASA’s Pasadena Jet Propulsion Laboratory—the people behind the recent Mars expedition—to design what he calls an “interplanetary Internet protocol.” He believes that astronauts will want to use the Internet, although special problems remain with interference and delay. “This is quite real. The effort is becoming extraordinarily concrete over the next few months because the next Mars mission is in planning stages now,” Cerf told the conference. “If we use domain names like Earth or Mars...jet propulsion laboratory people would be coming together with people from the Internet community.” He added. “The idea is to take the interplanetary Internet design and make it a part of the infrastructure of the Mars mission.” He later told a news conference that designing this system now would prepare mankind for future technological advances. “The whole idea is to create an architecture so the design works anywhere. I don’t know where we’re going to have to put it but my guess is that we’ll be going out there some time,” Cerf said. “If you think 100 years from now, it is entirely possible that what will be purely research 50 years from now will become commercial 100 years from now. The Internet was the same—it started as pure research but now it is commercialized.” 第31题:According to Cerf, the purpose to design interplanetary internet is to _____. [A] send real-time science data [B] communicate with astronauts [C] lay foundation for future technological advances [D] commercialize the technology
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举一反三
【单选题】桥式整流电容滤波电路输出电压平均值U0(AV)= ( )
A.
0.45U2
B.
0.9U2
C.
1.1U2
D.
1.2U2
【简答题】热平衡稳态情况下粒子通常处于 ______ 能级上。
【多选题】下列行为不符合礼仪规范要求的是?
A.
如果你平时惯用左手做事,那么也可以用左手和人握手
B.
按照女士优先的原则,男女见面握手时应女士先伸手
C.
已婚女士与未婚女士见面握手时,应未婚女士先伸手,因为未婚女士更加年轻
D.
有子女的女士与无子女的女士见面握手时,应有子女的女士先伸手,因为她的人生更加完整
【单选题】下列哪一项不属于工厂化育苗所选择三大类型的温室( )
A.
塑料管棚
B.
智能温室
C.
日光温室
D.
现代温室
【多选题】9 1989年救助公约关于适用范围作了哪些扩大:
A.
“可航水域或任何其他水域”,不再仅指海上救助
B.
任何关于救助的案件都可适用本公约
C.
“可航水域或任何其他水域”不包括内陆水域
D.
本公约适用在公约成员国境内提起的有关本公约所辖事项的诉讼或仲裁
【单选题】能使右心室后负荷增加的是
A.
主动脉瓣关闭不全
B.
心肌梗死
C.
高血压病
D.
心肌炎
E.
肺动脉瓣狭窄
【多选题】滚珠丝杠预紧的目的有( )。
A.
增加阻尼比,提高抗振性
B.
提高传动刚度
C.
消除轴向间隙
D.
加大摩擦力,使系统能自锁
E.
防止丝杠变形
【多选题】7-35. 下列符合握手礼仪规则的是()选择一项或多项:
A.
男女握手,女士先伸手
B.
长辈与晚辈,长辈先伸手
C.
已婚者与未婚者,未婚者先伸手
D.
职位高者与职位低者,职位低者先伸手
【单选题】单相桥式整流电容滤波电路输出电压平均值U0=( )UZ
A.
0.45
B.
0.9
C.
1.1
D.
1.2
【多选题】下列对甲烷气体的描述正确的有?()
A.
甲烷能间接引起气候变化
B.
甲烷的主要人为释放源是工业生产
C.
甲烷分子对全球变暖的贡献是二氧化碳分子的20多倍
D.
自然条件下,甲烷浓度的季节变化主要受氢氧自由基控制
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