分子式为C10H14的一取代芳香烃，其可能的结构有 ( )。 A．3种 B．4种

阅读理解

Dear Mom,

       Time flies quickly. Two months has gone by since I joined this boarding school. Everything is going

well. During my first month here, I was like a fish out of water. I came to realize how many things I should

thank you for.

       On the cold winter days, I have to get up early almost every morning to fetch hot water. I began to

feel ashamed that I never said 'thank you" every time you prepared (准备) hot water for me each morning on winter days before I got up.

       I am no longer that girl who was often unable to find her books in her bedroom. It used to take me a

lot of time to collect all the books for the day's classes. But I have gotten over that bad habit now. And

now I know how much time you used to take to collect my books every evening.

       I have learned to do the laundry on my own now. I came to realize that washing clothes is a boring

job, especially on winter days. Sometimes there is no hot water and I have to wash my clothes with cold

water by hand.

       I came to know how grateful (感激的) I should be to have you as my mom. Thank you, Mom.

                                                                                                                                                     Yours, 

                                                                                                                                                     Silvia

根据材料内容，选择最佳选项。

1. Silvia has been at the boarding school for _______.

A. one week        

B. two weeks

C. one month        

D. two months

2. The underlined word "ashamed" means "________" in Chinese.

A. 惭愧的

B. 恐惧的

C. 吃惊的

D. 轻率的

3. At the boarding school, Silvia doesn't ______ anymore.

A. do her laundry

B. put her books everywhere

C. say "thank you" to her mother

D. spend much time on her studies

4. From the letter we can learn that ______.

A. Silvia used to do her laundry at home

B. Silvia often helps her mom do housework  

C. Silvia's mom has done many things for her before

D. Silvia's mom usually does the laundry with cold water

5. Silvia wrote this letter in order to tell her mom _______.

A. her school life    

B. her thanks from her heart

C. she could do many things

D. she could look after herself  

女，35岁，常有胸闷，头颈部搏动感，体检心脏闻及病理性杂音，脉压增宽，有毛细血管搏动征。

根据周围血管体征，关于诊断考虑错误的是（）

A.主动脉瓣关闭不全

B.甲状腺功能亢进

C.严重贫血

D.动脉导管未闭

E.室间隔缺损

甲图为我国某省份轮廓图，箭头表示夏季盛行风向，乙图为其气温和降水状况。结合所学知识，读图回答问题。

（1）该省份的简称是__________。其省会城市A为_____________，著名的旅游城市B是_______。

（2）根据乙图判断，该省份的主要气候类型是_____________。

（3）该省北隔D____________海峡，与E_________省相望。

（4）根据图中信息可知，该省份的地势是_____________，其判断理由是_____________。图中山峰C是该省有名的_____________山。

（5）该省份降水___________侧多于___________侧（东西比较），因为___________________________________。

典型溃疡性结肠炎患者大便的特点是 ( )。

A．稀水样便

B．黏液便

C．蛋花汤样

D．糊状便

E．黏液脓血便

妄想性障碍的临床特征是

A．可以出现幻觉

B．妄想的内容多为片断的，非系统的

C．情感淡漠症状与妄想相伴随

D．以系统的妄想为突出特征

E．意志活动明显减退