已知一种碳原子可用于测定文物的年代，该原子的原子核内含有6个质子和8个中子，则核
题型：选择题
问题：
已知一种碳原子可用于测定文物的年代，该原子的原子核内含有6个质子和8个中子，则核外电子数为（ ）
A．2
B．6
C．8
D．14
题型：选择题
第三部分：阅读理解（共20小题，每题2分，满分40分）
阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。
A
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 culprits(肇事者)：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, that they belonged where other difficult-to-read things belonged.
Poets failed the readers, 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.
56．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
57． The underlined word “diversion”(in Paragraph 2) most probably means “________”.
A．concentration B．change C．amusements D．stories
58．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.
59．In the last paragraph, the writer questions_______.
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 poems