问题 单项选择题

下列结果说明主动脉瓣关闭不全系风湿性的是()

A.主动脉瓣短缩,增厚粘连伴狭窄

B.主动脉瓣环扩张

C.主动脉瓣呈二叶瓣

D.主动脉瓣增厚钙化

E.主动脉瓣根部扩张

答案

参考答案:A

解析:风湿性疾病侵犯瓣膜的主要病理变化为瓣叶增厚、短缩,而较少侵犯瓣膜环。因此本题A为正确答案。二叶瓣属先天性病变,瓣膜增厚钙化常见于退行性改变。

阅读理解

阅读理解。

     With the start of the new semester students around the country exchange their fun and fashionable

clothes for boring school uniforms.

     "The uniform makes us look like a bunch of clones, especially when we are doing morning exercises

in the playground, "said Qing, a Senior 2 from a high school in Shanghai. "But we are not exactly the

same from the top to the bottom. The boys wear different sport shoes and girls have different decorations ( 装饰品 )in their hair. These are the areas where you can express yourself" said Qing.

     Although it might be strange for boys to talk about fashion, they do care about what they wear in

school, especially shoes, according to Qing.

     "Nike and Adidas basketball shoes, although they are still the must for many of my friends ,are

becoming out-of-date," added. He explained, "Since Liu Xiang ran so fast in Athens, running shoes are

becoming popular in this autumn."

     "Still in fashion are the various baseball caps and American-style T-shirts with random English words

printed on them, "said Qing. "The accuracy ( 准确性 )of the written message isn't important. Often, the

words are misspelt .  Sometimes they do not even make sense " Qing said with a smile.

     Besides sports shoes and T-shirts, styles and colours of school bags are another opportunity for

students to express their taste in fashion. Some bags are made more eye-catching by decorating them

with small hanging dolls. Other fashionable items are the colourful drink contains which are now popular

among girls this semester.

     As in China, the new semester in the US also brings new fashion trends: shirts printed with Chinese

words, necklaces with Hebrew ( 希伯莱 )or Hindi ( 印度的 )characters, and Brazilian jewelry, are all

common in schools in Florida, according to Carmen Domingues, a high school student.

1. What does "a bunch of  clones"( Paragraph 2)mean?

A. All of the clothes are the same.    

B. All of the exercises are the same.

C. All of the clothes are different.    

D. All of the exercises are different.

2. How do the students express themselves in school?

A. The girls wear different sport shoes.      

B. All the students wear school uniforms.

C. The girls have different decorations in their hair.

D. The boys drink water from colourful drinks containers.

3.Why are Nike and Adidas basketball shoes becoming out-of-date?

A. Because the shoes are not eye-catching.

B. Because running shoes become more popular.

C. Because the shoes have been popular for a long time.

D. Because they have changed their opinions for Liu Xiang.

4. Which of the following is NOT the new fashion trends in the US?

A. Necklace with Hebrew or Hindi characters.

B. Baseball caps and American-style T-shirts.

C. Shirts printed with Chinese words.

D. Brazilian jewelry.

判断题