下列四个命题：①若m∈（0，1]，则函数f（x）=m+3m的最小值为23②已知平

阅读理解。

    During the 1800s, African Americans worked long days in the fields of the American South. They sang

songs that they had brought from Africa while working. One person sang a line. Then a group of workers

repeated it. The song’s words told of the hardships(艰苦) that people suffered. They clapped their hands

and stomped(跺) their feet to the music.

    In the 1860s, the music changed greatly. African American music took new forms. It was also influenced by dance music, which had great rhythm(节奏). Banjos(班卓琴) became popular. A blues singer usually sang a line and then played the banjo in reply. By the early 1900s, the guitar had taken the place of the

banjo in the blues music.

    The blues music has many obvious characteristics. One of them is that the musical notes() are often “

bent”. That is, they are changed slightly to give a song more strength.

    Lyrics are the words of a song. Blues lyrics describe everyday life. The lyrics are often about the relationships between men and women. They tell about sadness and overwork. They tell about finding and losing

love, having money or being poor, being happy or sad and lonely. They almost always use the rhythms of

everyday speech. A group of blues lyrics usually has three lines. The second line repeats the first line. The

third line has different words.

    By the 1940s, large numbers of African Americans moved to Chicago.There, a new kind of "Chicago" blues began. The new music was excellent dance music. Chicago blues led to the birth of a new music

style －rock and roll.

1.This passage is mainly about _________.

A. the blues music                       

B. the life of African Americans

C. the blues lyrics                        

D. the rhythms of different music

2.What information does the passage NOT provide?

A.How the blues music developed as time went by.

B.What the blues lyrics are mostly about.

C.When African Americans moved to the American South.

D.How long the banjo was popular in the blues history.

3.Which of the following is the most likely taken from a blues song?

A.You have to help me. I’ll die if you don’t. You have to help me.

B.You have to help me. You have to help me. I’ll die if you don’t.

C.I’ll die if you don’t help me. You have to help me. You have to help me.

D.I’ll die if you don’t help me. You have to help me. Please help me.

4.What fact does the passage lead you to believe?

A.African Americans sang songs after a long day’s work to relax in the 1800s.

B.The blues singers in the 1860s usually played the guitar while singing songs.

C.It is not difficult to tell the blues music from others from its musical notes.

D.Rock and roll was the most popular blues music in Chicago in the 1950s.

基底细胞癌

A．感染性休克
B．神经性休克
C．心源性休克
D．损伤性休克
E．失血性休克

阅读理解。

     It was Sunday. I had one last patient to see. I approached her room in a hurry and stood at the doorway.

She was an older woman, sitting at the edge of the bed, struggling to put socks on her swollen (肿胀的) feet.

I entered, spoke quickly to the nurse, and examined her chart. She was getting better.

     I looked down at her. She asked if I could help put on her socks. Instead, I said something like this."How

are you feeling? Your sugars "and blood pressure were high but they're better today. The nurse mentioned you

were anxious to see your son who's visiting you today. I bet you really look forward to seeing him."

     She Stopped me with a serious voice, as if she was giving an order."Sit down, Doctor. This is my story,

not your story."

     I was surprised and embarrassed. I sat down. I helped her with the socks. She began to tell me that her only

son lived around the corner from her, but she had not seen him in five years. She believed that her health proble

ms really had something to do with it. After hearing her story and putting on her socks, I asked if there was

anything else I could do for her. She shook her head and smiled. All she wanted me to do was to listen.

     Later on, I often thought of what that woman taught me. Everyone has a story and each story is different.

Some have a beginning, middle and end. Others wander without a clear conclusion. Yet all those things do not

really matter. What matters to the storyteller is that the story is heard-without interruption or judgment.

1. The writer went to visit the older woman to _____.

A. listen to her story

B. tell her good news

C. help her put on her socks

D. see if she was getting better

2. What problem did the older woman have?

A. She ate too much sugar.

B. She had high blood pressure.

C. She had too many visits.

D. She liked telling others stories.

3. The underlined word "it" in Paragraph 4 refers to the older woman's _____. 

A. not having seen her son for long

B. having no one to look after her

C. serious voice when giving orders

D. struggling to put socks on her feet

4. According to the text, we know that the writer was _____.

A. serious

B. honest

C. patient

D. humourous

5. What does the story mainly tell us?

A. Everyone should learn to listen to others.

B. Children had better stay with their parents.

C. We all have a story and each one is different.

D. Older women are good at telling their stories.

对于稀疏图，采用__________表示法较为节省存储空间。

患者，男性，78岁，因右下肢疼痛2天收住普外科。5年前因双下肢动脉硬化性闭塞症行左下肢截肢术。既往慢性支气管炎30年，高血压病15年，糖尿病20年，冠心病10年，陈旧性心肌梗死史5年。入院诊断双下肢动脉硬化性闭塞症。入院后行右下肢截肢术。术后第二天起出现气急、胸闷，并进行性加重，伴大汗，端坐呼吸，阵阵咳嗽，咳泡沫样痰，无发热。体检：半卧位，T37℃，HR172次／分，BP170／100mmHg，面罩吸氧，氧流量10L／min，RR35次／分，指脉搏氧饱和度93％，大汗淋漓，听诊双肺布满哮鸣音和湿啰音。

提示：患者经抢救处理，45分钟后测CVP9cmH₂O，PCWP12mmHg。HR160次／分，BP85／60mmHg，面罩吸氧，氧流量10L／min，RR38次／分，指脉搏氧饱和度89％，尿量400ml，大汗淋漓，精神萎靡。提问：根据上述情况，以下处理哪些正确（）

A.低水平开始呼气末正压通气或持续气道正压通气

B.静脉滴注多巴胺2～10μg／（kg·min）

C.立即停用硝酸甘油

D.皮下注射低分子肝素

E.使用阿司匹林

F.根据CVP和PCWP，适当补充血容量。