我国邮政编码是用阿拉伯数字组成，代表邮件收寄局的一种专用代号，也是居民和单位通信的代

明朝丝织业中出现的机房被认为是资本主义萌芽的标志，其主要依据是   [ ]

A．使用机器生产且具有一定规模

B．生产的目的是为了用于商品交换

C．“机户出资，机工出力，计时授值”

D．分工精细，生产有序

硬膜外阻滞麻醉时，在初量作用将消失时，注入第二次量，其剂量应为（）。

A.初量的一倍以上

B.与初量相等

C.初量的1／2～2/3

D.初量的1／4～1／3

E.以上都不是

下列哪项不是痔形成的因素

A．无静脉瓣

B．直肠上、下静脉丛畸形

C．静脉壁薄弱，结缔组织萎缩缺乏支持

D．腹压增高

E．直肠肛管慢性感染

根据《建设工程安全生产管理条例》第58条规定：“注册执业人员未执行法律、法规和工程建设强制性标准的，责令停止执业（）；情节严重的，吊销执业资格证书，5年内不予注册；造成重大安全事故的，终身不予注册；构成犯罪的，依照刑法有关规定追究刑事责任。”

A.3个月以上1年以下 

B.6个月以上2年以下 

C.1年以上3午以下 

D.3年以上5年以下

Like many other aspects of the computer age, Yahoo began as an idea, (1) into a hobby and lately has (2) into a full-time passion. The two developers of Yahoo, David Filo and Jerry Yang, Ph. D candidates (3) Electrical Engineering at Stanford University, started their guide in April 1994 as a way to keep (4) of their personal interest on the Internet. Before long they (5) that their homebrewed lists were becoming too long and (6) . Gradually they began to spend more and more time on Yahoo.

During 1994, they (7) yahoo into a customized database designed to (8) the needs of the thousands of users (9) began to use the service through the closely (10) Internet community. They developed customized software to help them (11) locate, identify and edit material (12) on the Internet. The name Yahoo is (13) to stand for "Yet Another Hierarchical Officious Orale", but Filo and Yang insist they selected the (14) because they considered themselves yahoos. Yahoo itself first (15) on Yang’s workstation, "akebono", while the search engine was (16) on Filo’s computer, "Konishiki".

In early 1995 Marc Andersen, co-founder of Netscape Communication in Mountain View, California, invited Filo and Yang to move their files (17) to larger computers (18) at Netscape. As a result Stanford’s computer network returned to (19) , and both parties benefited. Today, Yahoo (20) organized information on tens of thousands of computers linked to the web.

11（）

A.fluently

B.efficiently

C.exactly

D.actually