问题 单项选择题

下列关于缺铁性贫血的叙述,错误的是

A.血清运铁蛋白饱和度<15%

B.红细胞中央淡染区扩大

C.铁蛋白<12μg/L

D.血清总铁结合力减低

E.血清铁降低

答案

参考答案:D

解析: 缺铁性贫血时,红细胞常出现中央淡染区扩大,可能是血红蛋白合成减少和幼红细胞的异常额外分裂所致。血清铁蛋白含量能准确反映体内贮铁情况,缺铁性贫血时血清铁蛋白<12μg/L。缺铁性贫血时血清铁明显减少。血清总铁结合力是指血清中运铁蛋白全部与铁结合后铁的总量,实际反映运铁蛋白的水平,故缺铁性贫血时总铁结合力增高。血清运铁蛋白饱和度是指血清铁值在总铁结合力中所占的百分比,缺铁性贫血时其值<15%。

判断题
阅读理解

阅读理解。

     One of the best-loved American writers was William Sydney Porter, or O.Henry. From 1893 he lived with

his family in a house in Austin, Texas, which is now a museum. Visitors to Austin can see the house. It was

saved from destruction (破坏) and turned into a museum in1934. The museum is a good way to learn about

the interesting life of the American writer.

     William Porter rented this house in Austin and lived there with his wife Athol and daughter Margaret for

about two years. Many objects in the museum belonged to the Porters. Others did not. An important piece in

the room is the original photograph over here. It was taken there in the house about 1895. The piano there goes

back to the 1860s. His wife took lessons on it when she first moved to Austin.

     Porter did not start his career as a successful writer. He worked at a farm, land office and bank. He also

loved words and writing. The museum has a special proof (证明) of Porter's love of language- his dictionary.

It is said that he had read every word in that dictionary.

     Later William Porter was forced to leave Austin because he was charged (指控) with financial wrongdoing

at the bank and lost his job. Because he was afraid of a trail (审判), he left the country secretly. But he

returned because his wife was dying. After her death, he faced the trial and became a criminal. He served three

and a half years in a prison in Ohio.

      William Porter would keep his time in prison a secret. But there was one good thing about it. It provided

him with time to write. By the time he was freed, he had published 14 stories and became well known as

O.Henry.

     Porter later moved to New York City and found great success there. He published over 180 stories in the

last eight years of his life.

1. O.Henry's house in Austin has been well kept up till now so that ____.

A. Americans can explore their history

B more visitors will be attracted to Austin

C. visitors can learn about O.Henry's life

D. it can show the way of life in the 1860s

2. What do we know about the piano in the house?

A. It was hated by Porter's daughter.

B. It has a long history of about 150 years.

C. Porter's wife gave music lessons on it.

D. Porter usually created music on it.

3. How does the museum prove (证明) Porter was fond of language?

A. With a dictionary he used.

B. With the records they keep.

C. Using the books they wrote.

D. Using the photograph they keep.

4. Why did Porter escape from Austin?

A. He didn't want to lose his job.

B. He didn't want to make trouble.

C. He meant to save his wife's life.

D. He was charged with a crime.

5. From the last two paragraphs we know that _____.

A. Porter became famous suddenly

B. Porter spent his time in prison writing

C. Porter suffered (遭罪) a lot from his time in prison

D. life in prison provided what he could write for Porter