问题 单项选择题 B型题

用于恶性嗜铬细胞瘤治疗的放射性药物()。

A.131I-MIBG

B.131I-6-胆固醇

C.99mTc-MIBI

D.99mTcO4-

E.131I

答案

参考答案:A

解析:1.99mTc-MIBI双时相法,其早期影像主要反映甲状腺组织,2~3小时的残留影像可反映功能亢进的甲状旁腺组织。2.碘代苄胍类化合物是一类肾上腺神经原阻滞剂,其分子结构类似去甲肾上腺素,可选择性作用于肾上腺素能神经原受体,其中以间位碘代苄胍(MIBG)对肾上腺髓质的趋向能力最强,故可用131I-MIBG治疗恶性嗜铬细胞瘤。3.胆固醇是合成肾上腺皮质激素的原料,能被肾上腺皮质细胞摄取,其摄取的数量和速度与皮质功能密切相关。4.131I能被甲状腺癌组织摄取而显影。5.甲状腺自主性高功能腺瘤能强烈摄取99mTcO4-,而周围正常甲状腺组织常被抑制。

阅读理解

     Bad moods can actually be good for you,with an Australian study finding that being sad makes people less gullible (轻信), improves their ability to judge others and also boosts memory.

     The study, authored by psychology professor Joseph Forgas at the University of New South Wales,showed that people in a negative mood were more critical of, and paid more attention to, their surroundings than happier people, who were more likely to believe anything they were told.

     "Although positive mood seems to promote creativity, flexibility, cooperation, and reliance on mental shortcuts, negative moods trigger (引发) more attentive,careful thinking, paying greater attention to the external world,"  Forgas wrote.

     "Our research suggests that sadness...promotes information processing strategies best suited to dealing with more demanding situations."

     For the study,Forgas and his team conducted several experiments that started with inducing happy or sad moods in their subjects through watching films and recalling positive or negative events.

     In one of the experiments,happy and sad participants were asked to judge the truth of urban myths and rumors and found that people in a negative mood were less likely to believe these statements.

     People in a bad mood were also less likely to make snap decisions based on racial or religious prejudices, and they were less likely to make mistakes when asked to recall an event that they witnessed.

     The study also found that sad people were better at stating their case through written arguments, which Forgas said showed that a "mildly negative mood may actually promote a more concrete, accommodative and ultimately more successful communication style."

     "Positive mood is not universally desirable: people in negative mood are less prone to judgmental errors,are more resistant to eyewitness distortions (扭曲) and are better at producing highquality, effective persuasive messages," Forgas wrote.

     The study was published in the November/December edition of the Australian Science journal.

1. The study suggests that when someone is in a bad mood,he ________.

A. is particular about everything

B. shows less concern about others

C. is willing to believe what he hears

D. cares more about his surroundings

2. Which of the following is connected with positive mood?

A. New ideas.  

B. Being stubborn.

C. Being careful.  

D. Concentration.

3. How did researcher put the subjects in good or bad moods?

A. By watching sports programs.

B. By listening to happy or sad stories.

C. By dealing with demanding situations.

D. By thinking back on their past experience

4. Which of the following statements is TRUE according to the text?

A. Positive mood contributes to better judgement.

B. Sad people remembered what they saw precisely.

C. Cheerful people were less likely to believe rumors.

D. People in bad mood tend to make quick decisions.

5. The author intends to convice us that  ________.

A. Joseph Forgas made a great discovery

B. bad moods can actually be good for us

C. we should think positively and negatively

D. the Australian study is of practical value

6. 用30词左右概括文章大意

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