在带宽条件具备的情况下,()、()以及()用户均可安装iTV。

题型:填空题

问题:

在带宽条件具备的情况下,()、()以及()用户均可安装iTV。

考点:通信工程师FTTH装维类试题FTTH装维类试题题库
题型:填空题
手机是人们常用的通讯工具,它传递信息依靠的是(  )

A.电磁波

B.红外线

C.超声波

D.次声波

题型:填空题

受众对广播电视节目的消费投入是通过一种行为间接完成的,种行为是( )

A.按月付费

B.购买广播电视

C.按季付费

D.购买广告商品

题型:填空题

等渗性缺水的常见原因是()

A.大量利尿

B.水摄入不足

C.大量出汗

D.慢性肠梗阻

E.消化液急性丧失

题型:填空题

In the idealized version of how science is done, facts about the world are waiting to be observed and collected by objective researchers who use the scientific method to can’y out their work. But in the everyday practice of science, discovery frequently follows an ambiguous and complicated route. We aim to be objective, but we cannot escape the context of our unique life experience. Prior knowledge and interest influence what we experience, what we think our experiences mean, and the subsequent actions we take. Opportunities for misinterpretation, error, and self-deception abound.

Consequently, discovery claims should be thought of as protoscience. Similar to newly staked mining claims, they are lull of potential. But it takes collective scrutiny and acceptance to transform a discovery claim into a mature discovery. This is the credibility process, through which the individual researcher’s me, here, now becomes the community’s anyone, anywhere, anytime. Objective knowledge is the goal, not the starting point.

Once a discovery claim becomes public, the discoverer receives intellectual credit. But, unlike with mining claims, the community takes control of what happens next. Within the complex social structure of the scientific community, researchers make discoveries; editors and reviewers act as gatekeepers by controlling the publication process; other scientists use the new finding to suit their own purposes; and finally, the public (including other scientists) receives the new discovery and possibly accompanying technology. As a discovery claim works it way through the community, the interaction and confrontation between shared and competing beliefs about the science and the technology involved transforms an individual’s discovery claim into the community’s credible discovery.

Two paradoxes exist throughout this credibility process. First, scientific work tends to focus on some aspect of prevailing Knowledge that is viewed as incomplete or incorrect. Little reward accompanies duplication and confirmation of what is already known and believed. The goal is new-search, not re-search. Not surprisingly, newly published discovery claims and credible discoveries that appear to be important and convincing will always be open to challenge and potential modification or refutation by future researchers. Second, novelty itself frequently provokes disbelief. Nobel Laureate and physiologist Albert Azent-Gy6rgyi once described discovery as "seeing what everybody has seen and thinking what nobody has thought." But thinking what nobody else has thought and telling others what they have missed may not change their views. Sometimes years are required for truly novel discovery claims to be accepted and appreciated.

In the end, credibility "happens" to a discovery claim—a process that corresponds to what philosopher Annette Baier has described as the commons of the mind. "We reason together, challenge, revise, and complete each other’s reasoning and each other’s conceptions of reason.

Paragraph 3 shows that a discovery claim becomes credible after it()

A. has attracted the attention of the general public

B. has been examined by the scientific community

C. has received recognition from editors and reviewers

D. has been frequently quoted by peer scientists

题型:填空题

用已知浓度的酸滴定未知浓度的碱时,会导致待测碱液的浓度偏低的操作是()。

A.碱式滴定管用蒸馏水洗后,未用待测液润洗

B.配制碱液时,称量的固体吸潮

C.滴定中不慎将锥形瓶内液体摇出少量于瓶外

D.滴定前酸式滴定管尖嘴部分未充满溶液

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