[单选题]医疗影像云是部署在()上的PACS系统:
A.互联网
B.内网
C.移动云
D.私有云

To get a chocolate out of a box demands a considerable amount of unpacking: the box has to be taken out of its paper bag the plastic wrapper has to be tom off, the lid opened and the packing paper inside removed; the chocolate itself then has to be unwrapped from its own piece of paper. Similarly a pot of face cream comes surrounded by layers of paper, wedged inside a cardboard box, and the whole thing wrapped tightly in plastic.
It is not only luxuries which are wrapped in this way. With so many goods now produced centrally and sold in supermarkets it is becoming increasingly difficult to buy anything from nails to potatoes that is not already done up in plastic or paper.
The wrapper itself is of no interest to the shopper, who usually throws it away immediately. Useless wrapping accounts for much of the 31 pounds in weight of rubbish put out by the average London household each week. So why is it done Some of it, like the wrapping on