单项选择题

根据凯恩斯的流动性偏好理论，货币的需求动机不包括（　　）。

A.持币的谨慎动机
B.持币的交易动机
C.持币的生产动机
D.持币的投机动机
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单项选择题
Text 1 When I started my careef I was astonished by how superhuman some Fortune 500 executives were.It seemed they were magicians.Every decision they made based on deep market knowledge and up-to-date information.How did they do it?Thcy have marketing teams that can pull research together in hours.They have chiefs of staff who give them carefully crafied agendas for every day.These teams give Fortune 500 executives what appears to bc super-human knowledge.Foriunately for those of us who don't have Fortune 500 budgets at our disposal,it's getting easier and casier to build your own secret support staff.Within five years,most executives at any size company-and,indeed,most knowledge workers-will have tools that do much of the work of a CEO's private group.That is, Cyborg systems, or what I called agents .It will make this possible,using a blend of learning algorithms and distributed labor to perform an ever-widening range of tasks at low cost.With help from these agents,we'II be able to look as smari as those CEOs do today.I got one taste of this when I started using Wonder.Wonder is like having a personal researcher,deploying a small army of experts,including trained librarians,to do small,defined research projects for me.I ask Wonder for help.For$30 to$60,Wonder saves me hours every week.More and more products and services will fuse machine intelligence with crowd work to help users get things done.To be clear,CEO support teams aren't going away.Top executives will continue to see benefits from dedicated,trusted support staff who can handle difficult,urgent,delicate work.But machine intelligence systems can take on elements of what these people do at a much lower cost,democratizing many of these capabilities.Granted,there is going to be a lot of garbage before we realize the full promise of these virtual support armies.Many ofthem fail to live up to even basic promises,like this weather bot that has trouble telling you about the weather.But if you can filter through the many new offerings to fmd valuable tools,your work will improve and you may even start to look like those CEOs with the seemingly.Top executives will continue to benefit from support teams because________.
A.theyworkatamuchlowercost
B.theycanfulfilltheirpromise
C.theyaremoreintelligent
D.theycandealwithemergencysituation
单项选择题
患者，男，45岁，5天前突起寒战高热，最高体温40.6℃，伴肝区持续性胀痛。查 体:皮肤巩膜无黄染，右上腹肌紧张，压痛明显，肝肋缘下3cm，质地稍硬，触痛明显，表面无结节。肝B 超示肝右叶3cm X 2cm大小之液性暗区,未见结节影。本例最可能的诊断是
A.细菌性肝脓肿
B.阿米巴性肝脓肿
C.肝血管瘤并发感染
D.肝癌并感染
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