男性，53岁，夜尿频1年，无尿潴留史。直肠指诊：前列腺略大，质韧，中央沟变浅。B超残

把物流的各环节联系起来，进行整体设计和管理，以最佳的结构、最好的配合，实现物流整体的最优的方法是物流( )化。

A．合理

B．标准

C．社会

D．系统

根据现行增值税的规定，下列混合销售应当征收增值税的是

A.某建筑安装公司提供辅助材料为客户进行安装服务

B.某宾馆提供餐饮服务的同时销售烟酒饮料

C.批发企业销售货物并送货上门

D.防盗门生产商销售防盗门并负责安装

.

Bill Gates was born on October 28th, 1955. He and his two sisters grew up in Seattle. Their father, William H. Gates II, was a Seattle lawyer. Mary Gates, their late mother, was a school teacher.

Gates attended public elementary school before moving on to the private Lakeside School in North Seattle. It was at Lakeside that Gates began his career in personal computer soft- ware, programming computers at age 13.

In 1973, Gates entered Harvard University as a freshman, where he lived down the hall from Steve Ballmer, who is now Microsoft's president. While at Harvard, Gates developed a version (版本) of the programming language BASIC for the first microcomputer---the MITS Astair. In his junior year, Gates dropped out of Harvard to devote his energies full-time to Microsoft, a company he had started in 1975 with his boyhood friend Paul Allen. Guided by a belief that the personal computer would be a valuable tool on every office desk-top and in every home, they began developing software for personal computers.

Gates' foresight has led to the success of Microsoft and the software industry. He plays an important role in the technical development of new products. Much of his time is devoted to meeting with customers and staying in touch with Microsoft employees around the world through e-mail.

In the dozen years since Microsoft went public, Gates has donated more than $ 800 million to charities (慈善机构), including $ 200 million to the Gates Library Foundation to help libraries in North America make use of new technologies and the Information Age.

50. Where did Bill Gates begin his career in personal computer software?

A. At public elementary school.                  B. At the private Lakeside School.

C. At Harvard University.                           D. At Microsoft Company.

51. Why did he drop out of Harvard?

A. To change school.                                 B. To spend all his energies to Microsoft.

C. To find a full-time job.                          D. To earn money.

52. How does Gates spend much of his time?

A. Meeting with people.                            B. Travelling around the world.

C. E-mailing some friends.  

D. Meeting with customers and e-mailing Microsoft employees.

53. What does the underlined word "donated" in the last paragraph mean?

A. gave.                B. earned.              C. made.               D. received.

病历摘要：某金黄色葡萄球菌感染患者，利用克林霉素治疗一周后，突然出现发热、水样腹泻，便中有大量粘液和斑块状假膜。

抗感染治疗的基本原则可概括为“安全、有效、经济”，其中关键因素是“有效”。具体体现为（）。

A.合理选药

B.合理给药和考核疗效

C.认真观察疾病演变情况加强综合疗法

D.预防和避免抗微生物药物的不良反应和相互作用以及二重感染的发生

E.预防和延迟细菌耐性产生

康复医学主要的服务对象不是（）

A.各种疾病患者

B.残疾者

C.老年人

D.慢性病患者

E.疾病或损伤急性期及恢复早期的患者