dsa大型医疗设备上岗证考几个科目，who基本句型和用法?

dsa大型医疗设备上岗证考哪些科目？

都看往来考题卷及题库，另外书有《2014全国大型医用设备使用人员CT/MR/DSA上岗证考试指南技师》。

who基本句型和用法？

who的用法四种句型：可以用作疑问代词，也可用作限制性或非限制性的关系代词。

1.谁， 什么人 Who is that woman in the red hat?那个戴红色帽子的女人是谁？I wonder who will play in the basketball match.我不清楚这场篮球赛谁会上场。

2.（限制性关系代词）…人 He who laughs last laughs best.最后笑的人笑得最开心。

All who[that] heard him were delighted.全部听了他讲话的人都很高兴。

He is the only one who[that] knows Russian.他是我们中间惟一懂俄语的人。

3.（非限制性关系代词）他， 她， 他们 The committee, who were all young women, fulfilled their duties admirably.委员会的委员们都是些年轻妇女， 很好地履行了她们的职责。

关系代词who引导定语从句作句子的主语、宾语。定语从句由关系代词who、whom、whose、which、what、as和关系副词where、when、why等引导。

who的用法

1.who引导的定语从句的先行词是表示人的名词或代词。比如：

（1）The student who is answering the question is John.

已经在回答问题的那个学生是约翰。

（2）Anybody who breaks the laws will be punished.

任何违反法律的人都将受到惩罚。

2.who是主格，在定语从句中作主语，这个时候不可以省略。比如：

（1）The person who was here yesterday is a musician.

上一天来这儿的那个人是位音乐家。

在非正式英语中，who亦可作宾语，且可以省略。比如：

（2）The man（who）I saw just now is Mr Li.我刚才见到的那个人是李先生。

3.在定语从句中，who在人称、数上和其前面的先行词保持完全一样。如：

Do you know the boy who is standing over there?

你认识站在那边的那个男孩吗？

4.若先行词中既有人又有物，关系代词用that而不需要who。比如：

He watched the children and boxes that filled the car.

他看见了塞满汽车的孩子和箱子。

5.若先行词前面有形容词最高级、序数词修饰，关系代词用that而不需要who。比如：

（1）Yao Ming is the best basketball player that I know.

姚明是我清楚的最好的篮球运动员。

（2）Tom is the first boy that left the room.

汤姆是第一个离开这个房间的男孩。

who[英][hu:][美][hu]

pron.谁; 什么人; 关系代词，有先行词; 孰;

一、强调句型的用法

在英语中，我们经常会用到It is／was… who/that结构来突出强调句子的某一成分(大多数情况下是句子中主语，宾语或状语)。在这个句型中，it没有词汇意义，只是引出被强调的成分。假设被强调的成分是表示人的词，用who或that来连接都可以。假设是其它成分，则全部用that来连接。

E.g. It is my mother who／that cooks every day.

E.g. It was yesterday that Tom passed in the maths exam．

二、使用本句型的哪些须知

1．被强调成分是主语，who／that后面的谓语动词应该在人称和数上与原句中的主语保持完全一样。

e.g. It is I who am right． e.g. It is he who is wrong．

e.g. It is the students who are lovely．

2．就算被强调成分是句子中时间状语，地址位置状语，原因状语等，也不可以用when，where, because，要用 that。

E.g. It was after the war was over that Einstein was able to come back to his research work again .

E.g. It was in front of the bank that the old lady was robbed．

E.g. It was because of the heavy rain that he came late．

3．假设被强调的成分有同位语，同位语也应早一点。

It was from him，his chemistry teacher，that Paul learned to watch carefully in class．

4．被强调成分是作主语的代词，用主格是作宾语的代词，用宾格。 It was he that helped me yesterday. It was me that he helped yesterday.

5．被强调部分既涵盖人又涵盖物，用that不需要who

lt was the things and people that they remembered that they were talking about．

三、考试中，为了增多考试试卷难度，强调句型常常以疑问句形式产生。其大多数情况下疑问句形式是：

Is／Was it+被强调成分+who／that

Is it Mr.Smith who teaches you English?

其特殊疑问句形式是：疑问词+is／was+被强调成分+that...

Why was it that you did not attend the meeting yesterday?

When was it that this traffic accident happen?

Where was it that you put my English dictionary?

四、区分定语从句和强调句型某些定语从句和强调句型形式差很少，容易混淆。假设去除it is／ was ... that句子也还是通顺成立，则为强调句型，不成立不通顺，则为定语从句。

E.g. It was three years ago that he went to American for a further study·

去除It was that句子为Three years ago he went to America for a further study．句子通顺，意思完整，那么那就是一个强调句型。

it is...that/who...用作强调句时，不作句子成分，其实就是常说的说去除it is that 句子还是可以独自使用。这是和定语从句的区别。还用that引导的名词性从句也是这样的。 下面讲下强调句型：

1. 强调句型特点是：去除It be …that/who…，句子成分完整。

It is in the street that I met her 强调句 把it is that 去除，句子完整，in the street I met her. It is clear that not all boy like foot ball，去除后，clear not all boy like football不完整，不是强调句（是主语从句）

2. 强调句中唯有that/who/whom,不出现where，which, when等。

It is the street where I met her 定语从句 where 关系副词 做定语从句中的地址位置状语；

3. 假设强调时间地址位置 就看前面是否有介词, It is in the morning/at some place that.......大多数情况下情况下就是强调

判断是不是是强调句大多数情况下用以下方式：

把 It is/was ……that 去除，看句子是不是完整，若完整，则为强调句，若不完整，则为从句。 例子：It was at the school gate that I met an old friend of mine.(强调句)

It was the school gate where I met an old friend of mine. （定语从句）

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