放大摄影下,使用0.05mm的超微焦点 X线管,半影阈值为0.2mm,那么最大放大率

题型:单项选择题

问题:

放大摄影下,使用0.05mm的超微焦点 X线管,半影阈值为0.2mm,那么最大放大率是

A.3倍

B.4倍

C.5倍

D.6倍

E.8倍

考点:放射医学技师放射技师基础知识初级放射医学技师基础知识2
题型:单项选择题

 

Let me tell you my pen friend Ivan. He is 12 years old. He likes playing football. He usually play football with his friends at weekends.

Ivan lives with his father and mother in a city in France. They have a dream home with five rooms, a swimming pool and a garden. They often have a party in the garden at weekends. They like to help their neighbours. His home is not near his school, so Ivan takes a bus for an hour and then walks for 10 minutes to school. There is a Basketball Club near his school. He likes play basketball in the club.

Ivan’s father is a worker. He is busy. Ivan’s mother is a doctor. She is nice to the patients. Ivan wants to be a teacher when he grows up. I want to be a teacher, too. Every month Ivan writes two letters to me. He’ll come to Suqian next year. We’ll meet then.

小题1:What are Ivan’s hobbies?

A.Basketball and swimming

B.football and basketball

C.Football and swimming

D.Reading and swimming小题2:How old is Ivan when he comes to Suqian?

A.He is 11.

B.He is 12.

C.He is 13.

D.He is 14.小题3: How often does Ivan write to me?

A.Twice a month.

B.Twice a week.

C.Every day.

D.Every week.小题4: Ivan studies in _________ now.

A.America

B.Suqian

C.France

D.Japan小题5:Which is the best title(标题) for the passage?

A.How to Make Penfriends

B.Something About Ivan

C.What Is Ivan’s Home Like

D.Ivan’s School Life

题型:单项选择题

中国移动湖北分公司开设适合普通用户的两种通讯业务分别是:“全球通”用户先缴25元月租,然后每分钟通话费用0.2元;“神州行”用户不用缴纳月租费,每分钟通话0.4元.(通话均指拨打本地电话)

(1)设一个月内通话时间约为x分钟,这两种用户每月需缴的费用各是多少元?(用含x的式子表示)

(2)一个月内通话多少分钟,两种移动通讯方式费用相同?

(3)若李老师一个月通话约80分钟,请你给他提个建议,应选择哪种移动通讯方式合算一些?请说明理由.

题型:单项选择题

无机结合料( )的塑性指数为12~18,有机质含量≤10%,硫酸盐质量≤0.8%。

A.水泥稳定土

B.砂砾稳定土

C.石灰稳定土

D.石灰工业废渣稳定土

题型:单项选择题

下述各项控制梭状芽孢杆菌生长繁殖的方法中错误的是

A.用止血带防止感染扩散

B.用3个大气压的纯氧治疗

C.可使用四环素

D.投给大剂量的青霉素

E.用氧化剂冲洗创口

题型:单项选择题

税收执法管理信息系统V1.1版考核子系统,对防伪税控系统的业务操作进行监控。

更多题库