搜题请搜索小程序“爱下问搜题”
问题 单项选择题 共用题干题

病历摘要：患者，男，23岁，学生，由于“昏迷半小时”，由旅行社于11pm送来急诊。病史（同伴提供）：患者近几日来饮水较多，每日饮水约4000ml，但仍常诉口渴，而且喜冷饮。约每1小时需排尿一次（量不详），夜尿4-5次。食欲不佳，昏迷前一天曾有呕吐胃内容物2～3次，未见咖啡色样物，曾听患者诉“由于饮水太多，口淡，胃口不好，不如改喝可乐有味”。体查：T：38．6℃，R：16次／分，Ｐ：72次／分，BP130／80mmHg，昏迷，双瞳孔等大等圆，d＝2．5cm，对光反射存在，皮肤干燥，弹性差，中度脱水貌。呼吸较深大，有烂苹果味，双肺呼吸音清，未闻及干湿啰音。心界不大，HR：72次／分，各瓣膜区未闻及明显病理性杂音。生理反射存在，病理反射可疑。

补液总量按体重的多少估计（）。

A.1％

B.2％

C.5％

D.10％

E.20％

F.30％

G.40％

H.50％

答案

参考答案：D

问答题

火车作为人类重要的运输工具，由于质量大、车身长，并由多节车厢组成，在刹车时车厢之间会互相碰撞，使火车不能平衡运行，从而降低了行车的安全性．请你利用所学知识，在火车车厢之间设计一个设施，使之能有效克服上述问题，说明你设计的器材和依据的道理．
查看答案
单项选择题

WWW is popular for its multimedia transmission and friendly (71) . Although the speed of network has been improved considerably in recent years, the rapid (72) of using the Internet, the inherited character of delay in the network and the Request/Response working mode of WWW still make the Internet traffic very (73) and give no guarantee on the Quality of Service. Because HTTP has no states, the web server cannot know the users’ demand and the users’ requests cannot be predicted Taking advantage of a cache mechanism and the time locality of WWW accesses, the browser can preserve the documents ever accessed in the local machine. By this means, for the documents in the local cache, the browser does not need to send the requests to the remote server or to receive the whole responses from the remote one Pre-fetching uses the space locality of accesses First, the users’ access requests are predicted according to the users’ current request. Secondly, the expected pages are fetched into the local cache when the user is brow sing the current page. Finally, the users can access these pages downloaded from the local cache. And this can reduce the access delay to some degrees. Pre-fetching is one kind of active caches that can cache the pages which are still not requested by the user. The application of pre-fetching technology in the web can greatly reduce the waiting time after users have sent their requests. This paper brings forward an intelligent technique of web pre-fetching, which can speed up fetching web pages. In this technique, we use a simplified WWW data model to represent the data in the cache of web browser to mine the association rules. We store these rules in a knowledge base so as to (74) the user’s actions. In the client sides, the agents are responsible for mining the users’ interest and pre-fetching the web pages, which are based on the interest association repository. Therefore it is (75) for the users to speed up the browsing.

（72）处填（）。

A．reduction

B．expansion

C．reduce

D．expansible
查看答案