试题与答案

常用的保存食物的方法主要有 ①高温②低温③干燥④保持湿润⑤暴露于空气中⑥隔绝空气

题型:选择题

题目:

常用的保存食物的方法主要有

①高温 ②低温 ③干燥 ④保持湿润 ⑤暴露于空气中 ⑥隔绝空气

A.①③

B.②③⑥

C.①④⑤

D.②④⑤

答案:

答案:B

题目分析:各种细菌、真菌等微生物,接触到食物,并利用食物中的养分,大量的生长和繁殖,期间会产生很多的生长代谢产物,产生各种各样酸、臭的味道,所以食品腐败变质,因此食物腐败变质是由于微生物的生长和大量繁殖而引起的,根据食物腐败变质的原因,食品保存就要尽量的杀死或抑制微生物的生长和大量繁殖,如低温、干燥、隔绝空气等措施可以抑制微生物的生长和繁殖,利于保存食物,所以此题答案为B。

点评:此题主要考查的是防腐的原理以及保鲜方法的知识,可联系生活实际进行解题。

试题推荐
题型:单项选择题

TCP/IP (71) layer protocols provide services to the application (72) running on a computer. The application layer does not define the application itself, but rather it defines
(73) that applications need — like the ability to transfer a file in the case of HTTP. In short, the application layer provides an (74) between software running on a computer and the network itself. The TCP/IP application layer includes a relatively large number of protocols, with HTTP being only one of those. The TCP/IP (75) layer consists of two main protocol options — the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).

A. hardware B. software C. packetD. equipment

查看答案
微信公众账号搜索答案