下列概念的解释,错误的是 A.斜率指连接特性曲线指定两点密度的直线与横坐标夹角的正切

题型:单项选择题

问题:

下列概念的解释,错误的是

A.斜率指连接特性曲线指定两点密度的直线与横坐标夹角的正切值
B.感光度产生密度1.0所需曝光量的倒数
C.本底灰雾是胶片未经曝光显影加工后的密度
D.密度是入射光强度与透过光强度比的对数值
E.最大密度是最高管电压允许的最大曝光量产生的密度

考点:医技考试放射技士专业知识初级放射医学技士专业知识
题型:单项选择题

下列有关阿伏加德罗常数(NA)的说法错误的是(    )

A.1molH2O含有的H2O分子数目为NA

B.1molH2O含有的原子数目为3NA

C.32克O2所含的原子数目为NA

D.通常状况下,11.2L氮气含氮分子数目为0.5NA

题型:单项选择题

Farah was sitting in the kitchen going over the party list with her mother.The exams were over and Farah wanted to invite her friends for a party.

“Farah,aren’t you going to invite Hafsa?”her mother asked.Hafsa had been her best friend since childhood.

“Mother,you know I am now a part of Purple Girls Club and we have some rules about people we can be friends with,”Farah answered.

“Really?And what are the rules?”her mother asked.

“Well,only very pretty girls can be part of our group.And Hafsa is so...you know...dark.”

“I cannot believe it,”her mother said angrily. 

As Farah left the kitchen,her father called  her from the living room.

Farah went to her father and paled when she saw the exam report in his hands.“Farah,what has happened to your grades?You have failed in Mathematics,”her father said.

Farah had no answer.The truth was that the activities of Purple Girls Club left her with very little time for studies.

“Farah,it says that you can take part in supplementary exams(补考).If your grades don’t improve then,I’ll cancel(取消) your trip to Spain.”

Farah went to her room and called Gina,the leader of Purple Girls Club, “Gina,can you help me to complete my notes before the exams?”

Gina laughed.“Exams?Who cares about exams?”

One by one,she called her friends in the club but no one seemed to care or wanted to help.

Farah knew Hafsa would help her.Farah also knew Hafsa had been hurt by her,but Hafsa said,“If you need any help,just let me know.We can study together till your exams.”

Next Monday,as two friends entered the school together,Gina called out.

“Farah,you know our rules.You cannot be friends with those who do not belong to our club.”

“Gina,I have a new rule about friendship,”Farah replied.

小题1:After Farah became a member of Purple Girls  Club,she chose a friend according to a person’s________.

A.looks

B.usual activities

C.grades

D.favorite colors小题2:Farah became pale after going to her father because________.

A.he didn’t allow her to go to Spain

B.she didn’t do well in her exams

C.she had to leave Purple Girls Club

D.he asked her to improve her grades小题3:Which word can best describe Hafsa?

A.Silly.

B.Beautiful.

C.Rude.

D.Kind.小题4:What lesson can we learn from the passage?

A.A friend in need is a friend indeed.

B.A perfect friend will never be found.

C.Be slow in choosing a friend.

D.Friendship can be developed easily.

题型:单项选择题

下列哪种类型的金融情报机构,通常是由检察部门负责接收可疑交易活动报告?()

A.行政型

B.执法型

C.司法型或诉讼型

D.混合型

题型:单项选择题

()是对职工所应承担任务的规定。

A.职务

B.责任

C.职责

D.岗位

题型:单项选择题

NOKIA设备,小区最小接入电平是由参数()控制。

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