问题 单项选择题 A1型题

紫外线的生物学作用不包括()

A.红斑作用

B.色素沉着作用

C.免疫调节作用

D.抗佝偻病作用

E.镇静降压作用

答案

参考答案:E

解析:其生物学作用包括: (1)紫外线能使组织的氧化还原过程增强。(2)紫外线照射对机体产生的局部(照射部位)及全身的作用可分为光毒反应和光免疫反应。(3)大量研究证明,紫外线的全光谱都具有杀菌特性,作用较强的是在C段。(4)紫外线照射还能影响机体的矿质代谢,如刺激机体产生维生素D,预防因维生素D缺乏引起的不良反应;紫外线照射可使血锌含量逐渐上升,使膜结构稳定,以抗膜的过氧化作用。

完形填空

One Friday night, a poor young man stood at the train station. He played his violin and many people put 41  into the hat in front of him.  

The next day, the young man came to the station 42  . But this time he took out a large piece of paper 43 some words on it. It said “Last night a lady 44  Mrs Sang put an important thing into my hat 45  . Please come for it.”  

After about an hour, a middle-aged woman ran to the young man in a hurry and said, “You do come here. I know that you’re a(n) 46  man and will certainly come here.” They had a talk and the young man made sure she was the owner. Then he took out a lottery ticket and 47  it to the woman. Her husband bought a lottery ticket every day. Yesterday when she knew the lottery ticket he bought won, she was very 48  . The prize of the lottery ticket was $ 500,000. When she walked past the young man, she took out $50 and put it in the hat. 49  , the lottery ticket was also thrown in.  

Later, someone asked the young man, “You play the violin every day to make money. Why didn’t you just take the prize of the lottery ticket for yourself?” the young man said,“Although I don’t have much money, I live happily. But if I 50  honesty, I won’t be happy forever.”  

小题1: A. money       B. tickets          C. paper  

小题2: A. instead       B. differently      C. again  

小题3: A. for          B. with           C. over  

小题4: A. introduced    B. spelled         C. named  

小题5: A. by mistake     B. for mistake      C. on mistake  

小题6: A. crazy         B. cool        C. honest  

小题7: A. gave          B. lent            C. offered  

小题8: A. surprising       B. happy          C. exciting  

小题9: A. But            B. However      C. Therefore  

小题10: A. have            B. win             C. lose  

单项选择题