什么是活化部分凝血活酶时间(APTT)?

可能蒸发量指在下垫面足够湿润条件下，水分保持充分供应的蒸发量。读中国部分区域干燥度等值线分布图，回答下列各题：

小题1:根据图中等值线的分布规律推测干燥度是指

A．降水量与实际蒸发量之比

B．实际蒸发量与降水量之比

C．降水量与可能蒸发量之比

D．可能蒸发量与降水量之比小题2:关于该区域干燥度分布及成因的叙述正确的是

A．甲处等值线弯曲的原因是位于山地背风坡

B．乙处比丙处干燥度变化慢

C．本区域干燥度自南向北递增

D．影响该区域干燥度分布最主要因素是海陆位置

《长生殿》的作者是我国清代的（）。

A.关汉卿

B.孔尚任

C.洪升

D.李渔

夜间上网2个半小时，消费最低廉的用户总计费用为多少（）

A．7.95元

B．12.9元

C．4.95元

D．20.85元

对心脏有毒性作用的抗恶性肿瘤药是（）

A.6-巯基嘌呤

B.氮介

C.白消安

D.博来霉素

E.阿霉素

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.

（75）处填（）。

A．transparent

B．clear

C．fuzzy

D．changeable