【简答题】数码相机是一种新兴的照相器材,它同普通照相机不同之处,在于它没有底片,而是通过一个特殊的感光层CCD,将图象的光信号转化成为数字信号保存起来.下表是某数码相机的一些参数,请你根据这个表格,用所学过的知识来说明,感光层离开镜头的距离要满足什么条件:______;要成像,物体离开镜头的距离要满足什么条件:______. 型号 镜头焦距 光圈快门 CCD解析度 Sony-S70 34mm 8s-1/10...
【简答题】●At a basic level, cloud computing is simply a means of delivering IT resources as ().Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networ...
【简答题】● At a basic level, cloud computing is simply a means of delivering IT resources as(71).Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, netw...
【单选题】Cloud computing relies on sharing of resources to achieve coherence and economies of scale. Which of the following is NOT belonging to the characterics of cloud computing?
A.
Cost reductions. Infrastructure is typically provided by a third party and need not be purchased for one-time or infrequent intensive computing tasks.
B.
Maintenance of cloud computing applications is easier, because they do not need to be installed on each user's computer and can be accessed from different places.
C.
Device and location independence enable users to access systems using a web browser regardless of their location or what device they use.
D.
Productivity may be increased when multiple users can work on the same data simultaneously, rather than waiting for it to be saved and emailed. Time may be saved as information does not need to be re-entered when fields are matched, nor do users need to install application software upgrades to their computer.
E.
Reduced security. Considering about loss of control over certain sensitive data, and the lack of security for stored kernels.
【判断题】孕早期的膳食指导:注意进食动物肝脏、深绿色蔬菜、豆类等富含叶酸的食物,并每日服用叶酸补充剂 400 μ g 。
【判断题】中国国航的飞机经营悉尼到布里斯班的航线,属于第八航权?
【单选题】光圈,在镜头焦距相同,拍摄距离相同时,光圈越小,景深的范围越( );光圈越大,景深的范围越( ).