与人身保险相比，下列（）不属于财产损失保险的保险利益的特殊性。 A.财产保险的保险利

预期收益率相同的情况下，投资收益率的概率分布越集中，则表示（ ）

A．风险程度越高

B．风险程度越低

C．风险程度不变

D．风险程度无法确定

信息系统开发的基本内容包括下面五条中的哪些
Ⅰ．系统建设的可行性研究
Ⅱ．系统研制队伍的建立
Ⅲ．系统开发策略、方法和步骤的选择和确定
Ⅳ．开发工具和开发环境的选择和提供
Ⅴ．系统的设备配置和数据库总体设计

A．Ⅱ，Ⅲ，Ⅳ和Ⅴ

B．Ⅲ，Ⅳ和Ⅴ

C．全部

D．Ⅰ，Ⅱ，Ⅲ和Ⅳ

男，34岁，心前区疼痛1周入院。且出现进行性呼吸困难。查体：颈静脉怒张，右肺叩浊音，可闻及管状呼吸音，心界向两侧扩大且随体位改变，肝大，肝颈静脉回流征阳性。考虑最大可能诊断为（）

A.心绞痛

B.心肌梗死

C.心力衰竭

D.心包积液

E.心肌病

结核菌素试验72小时注射部位出现红肿硬结直径20mm并出现水疱、坏死。判断结果是（）

A.“-”

B.“±”

C.“+”

D.“+++”

E.“++++”

Visitors to Britain may find the best place to sample local culture is in a traditional pub. But these friendly hostelries can be minefields of potential gaffes for the uninitiated.
An anthropologist and a team of researchers have (1) some of the arcane rituals of British pubs—starting with the (2) of getting a drink. Most pubs have no waiters—you (3) to go to the bar to buy drinks. A group of Italian youths (4) for 45 minutes before they realized they would have to (5) for their own. This may sound inconvenient, but there is a (6) purpose.
Pub culture is designed to (7) sociability in a society known for its reserve. Standing at the (8) for service allows you to chat with others (9) to be served. The bar counter is possibly the only (10) in the British Isles in which friendly conversation with (11) is considered entirely appropriate and really quite normal (12) . "If you haven’t been to a pub, you (13) been to Britain." This tip can be found in a (14) , Passport to the Pub: The Tourists’ Guide to Pub Etiquette, a (15) code of conduct for those wanting to sample "a central part of (16) life and culture". The trouble is that if you do not (17) the local rules, the experience may fall flat. For (18) , if you are in a big group, it is best if only one (19) two people go to buy the drinks. Nothing irritates the (20) customers and bar staff more than a gang of strangers blocking all access to the bar while they chat and dither about what to order.