人耳能感知声音,是外界的声音引起______振动,耳经过听小骨及其它组织传给__

题型:填空题

问题:

人耳能感知声音,是外界的声音引起______振动,耳经过听小骨及其它组织传给______,再传给______,这样人就听到了声音.

考点:耳朵的构造,骨传声,双耳效应
题型:填空题

如图所示,A、B、C三个物体放在旋转的圆台上,它们由相同的材料制成,A的质量为2m,B、C的质量均为m,如果,当圆台匀速旋转时,三物体均没有滑动,下列结论正确的是 (   )

A、C物体向心加速度最大     

B、B物体的静摩擦力最小

C、三个物体都受重力、支持力、摩擦力和向心力 

D、当圆台转速增大时,A比B先滑动

题型:填空题

Passage 1 The development of the Information Society must be based on platforms of internationally interoperable technical standards, accessible for all, and technological innovation of ICTs, as well as systems to promote the exchange of knowledge at global, regional and sub-regional levels through any media. In this regard, in addition to enhancing people’s awareness of the advantages of using ICTs, reliable, advanced and appropriate ICT technologies and services infrastructure are required. // As a sharp increase in the volume of international and regional Internet traffic is anticipated, it is important to strengthen regional and international broadband network infrastructure by using new technologies to enhance network efficiency and provide the capacity to match the needs of the countries in the region. // Working towards open and flexible international and interoperable standards is an important issue for all countries so as to ensure that all can utilize the technology and associated content and services to their maximum potential. Development and deployment of open-source software should be encouraged, as appropriate, as should open standards for ICT networking. // In order to achieve affordable and universal access it is important to enable existing and new technologies to provide connectivity to all, in particular through institutions accessible to the public such as schools, libraries, post offices and multi-purpose community centers. Special attention should be paid to how ICTs can benefit the disadvantaged, through innovative initiatives. // High-quality access, attainable through broadband, has great potential to help better deliver essential services required to meet basic human needs through applications such as e-education and e-health, as well as e-business and other ICT applications. Also, new technologies, such as wireless and satellite networks can assist remote areas, including small island nations, to gain access to information and knowledge. // Linguistic and cultural diversity enriches the development of society by giving expression to a range of different values and ideas. It can facilitate the spread and use of information by presenting it in the language and cultural context most familiar to the user, thereby further encouraging the use of ICTs. // Promoting broadband networks in the Asia-Pacific region could not only support research, business and personal activities, but also help to preserve cultural diversity and indigenous knowledge and traditions. In this context, an effort should be made to support multilingual domain names, local content development, digital archives, diverse forms of digital media, content translation and adaptation. The development of standard and recognized character sets and language codes should also be supported. //(Excerpt from "The Tokyo Declaration—the Asia-Pacific perspective to the WSIS")

题型:填空题

阅读材料并结合所学知识回答问题。

小亮一家三代人一起观看“科技改变生活”的电视专题片,并对此展开讨论。

(1)科技发展给我们的生活还带来哪些变化?请举出一例。

_______________________________________________________________________________

(2)“科技改变生活”体现了我们所学习的哪一观点?

_______________________________________________________________________________

(3)科技成果的取得说明我国正在实施哪一战略?

_______________________________________________________________________________

题型:填空题

一般来说,同一物质的闭杯闪点比开杯闪点()。

A.高

B.低

C.二者相等

D.二者关系不定

题型:填空题

课程计划对学校和小学教师的要求有哪些?

更多题库