问题 单项选择题 B型题

只能测定可溶性细胞因子的是().

A.生物学活性测定方法

B.ELISA法

C.流式细胞仪分析法

D.酶联免疫斑点试验

E.分子生物学测定方法

答案

参考答案:B

解析:1.生物学活性测定方法的优点是该方法测定的是细胞因子的生物活性,但是细胞因子的前体分子通常无生物学活性,故不能用生物学活性测定方法检测。2.ELISA法主要用于可溶性细胞因子的测定。3.酶联免疫斑点试验可在光学显微镜下观察分泌细胞因子的细胞。4.分子生物学测定方法可检测细胞因子基因的缺失和突变。

阅读理解

阅读理解。

     BAGHDAD-An Iraqi soldier went on the rampage at a joint security station in northern Iraq on Wednesday,

shooting dead two US soldiers and wounding six, the US military said. 

                                         

     A US soldier looks at destroyed vehicles at a parking lot after a bomb attack in Baghdad November 12,2008.

A parked car bomb killed four people and wounded 14 others, including two policemen, in Sadoun street in

central Baghdad, police said. [Agencies]

     The US military said the soldier opened fire on the Americans at the station. one of many in which Iraqi and

US troops operate side by side, in the city of Mosul. "The soldiers were in the courtyard……an Iraqi soldier

entered and shot two soldiers, killing one, mortally wounding another,and then spraying the others," said US

army spokeswoman for northern Iraq Major Peggy Kageleiry.

     "He was engaged by counter-fire and killed," she added. A local morgue said it had received the body of the

Iraqi soldier, riddled with bullets.

     Two local police sources and an Iraqi army source, all of whom declined to be named because of the

sensitivity of the subject, said a quarrel had broken out between the Iraqi and US soldiers at the joint station.

     But Kageleiry denied there was any altercation between the soldiers before the shooting.

     "The US soldiers had no conversation with this soldier and there was no interaction of any kind before they

were murdered," she said.

1. What does the word "altercation" mean?

A. disagreement

B. conflict

C. quarrel

D. debate

2. Why didn't the local police sources tell their name?

A. Because they were afraid of American soldiers.

B. Because American soldiers quarreled with them.

C. Because the government asked them not to do so.

D. Because they didn't want to be involved in it.

3. What can we infer from the passage?

A. There was only one conflict between the two armies.

B. More people will die.

C. The quarrel caused the shooting.

D. Kageleiry was sure that American soldiers did nothing wrong.

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