问题 单项选择题

下列激素中,哪一个不是由腺垂体合成和分泌的

A.生长素

B.催乳素

C.缩宫素

D.黄体生成素

E.卵泡刺激素

答案

参考答案:C

解析:腺垂体主要分泌7种激素,其中促甲状腺激素(TSH)、促肾上腺皮质激素(ACTH)、卵泡刺激素(FSH)与黄体生成素(LH)均有各自的靶腺,分别构成下丘脑-腺垂体-甲状腺轴、下丘脑-腺垂体-肾上腺皮质轴和下丘脑-腺垂体-性腺轴。缩宫素是由下丘脑视上核和室旁核内神经细胞合成,经下丘脑垂体束运输至神经垂体储存和释放的。

多项选择题
阅读理解

阅读理解。

     Reading poems is not exactly an everyday activity for most people. In fact, many people never read

a poem once they get out of high school.

     It is worth reminding ourselves that this has not always been the case in America. In the nineteenth

century, a usual American activity was to sit around the fireside in the evening and read poems aloud.

It is true that there was no television at the time, nor movie theaters, nor World Wide Web, to provide

diversion. However, poems were a source of pleasure, of self-education, of connection to other people

or to the world beyond one's own community. Reading them was a social act as well as an individual

one, and perhaps even more social than individual. Writing poems to share with friends and relations

was, like reading poems by the fireside, another way in which poetry has a place in everyday life.

     How did things change? Why are most Americans no longer comfortable with poetry, and why do

most people today think that a poem has nothing to tell them and that they can do well without poems?

     There are, I believe, three factors: poets, teachers, and we ourselves. Of these, the least important is

the third: the world surrounding the poem has betrayed us more than we have betrayed the poem. Early

in the twentieth century, poetry in English headed into directions unfavorable to the reading of poetry.

Readers decided that poems were not for the fireside or the easy chair. at night, and that they belonged

where other difficult-to-read things belonged.

     Poets failed the reader, so did teachers. They want their students to know something about the skills

of a poem, they want their students to see that poems mean something. Yet what usually occurs when

teachers push these concerns on their high school students is that young people decide poems are

unpleasant crossword puzzles.

1. Reading poems is thought to be a social act in the nineteenth century because _____.

A. it built a link among people

B. it helped unite a community

C. it was a source of self-education

D. it was a source of pleasure

2. The underlined word "diversion" most probably means _____.

A. concentration

B. change

C. amusements

D. stories

3. According to the passage, what is the main cause of the great gap between readers and poetry?

A. Students are becoming less interested in poetry.

B. Students are poorly educated in high school.

C. TV and the Internet are more attractive than poetry.

D. Poems have become difficult to understand.

4. In the last paragraph, the writer question _____.

A. the difficulty in studying poems

B. the way poems are taught in school

C. students' wrong ideas about poetry

D. the techniques used in writing poem