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问题 选择题

钢笔的笔头是合金钢，其笔头尖端是用机器轧出的便于使用的圆珠体。为了改变笔头的耐磨性能，在笔头尖端点上铱金粒，为区别钢笔而叫铱金笔，铱金笔是笔头用黄金的合金、笔尖用铱的合金制成的高级自来水笔。下列说法中错误的是

A．钢笔的笔头不易被氧化，抗腐蚀性能好

B．铱金笔的耐磨性能比钢笔要好

C．铱金笔的笔头和笔尖都是用纯金制成的

D．铱金笔经久耐磨，书写时弹性特别好，是一种理想的硬笔

答案

答案：C

题目分析：钢笔的笔头是合金钢制成的，所以钢笔的笔头不易被氧化，抗腐蚀性能好，所以A正确。“为了改变笔头的耐磨性能”，所以铱金笔的耐磨性能比钢笔要好，所以B、D项正确。铱金笔是笔头用黄金的合金、笔尖用铱的合金制成的，所以C项错误。

点评：读懂信息基础上，注意和信息有差异的地方着重分析，此题属于简单题型。

单项选择题

Phyllis Wheatley is regarded as America’’s first black poet. She was born in Senegal, Africa, about 1753 and brought to America aboard a slave ship at about the age of seven. John and Susannah Wheatley bought her for three pounds at a slave auction in Boston in 1761 to be a personal servant of Mrs. Wheatley. The family had three other slaves, and all were treated with respect. Phyllis was soon accepted as one of the family, which included being raised and educated with the Wheatley’’s twin 15-year-old children, Mary and Nathaniel. At that time, most females, even from better families, could not read and write, but Mary was probably one of the best educated young women in Boston. Mary wanted to become a teacher, and in fact, it was Mary who decided to take charge of Phyllis’’s education. Phyllis soon displayed her remarkable talents. At the age of twelve she was reading the Greek and Latin classics and passages from the Bible. And eventually, Mrs. Wheatley decided Phyllis should become a Christian.At the age of thirteen Phyllis wrote her first poem. She became a Boston sensation after she wrote a poem on the death of the evangelical preacher George Whitfield in 1770. It became common practice in Boston to have "Mrs. Wheatley’’s Phyllis" read poetry in polite society. Mary married in 1771, and Phyllis later moved to the country because of poor health, as a teacher and caretaker to a farmer’’s three children. Mary had tried to interest publishers in Phyllis’’s poems but once they heard she was a Negro they weren’’t interested.Then in 1773 Phyllis went with Nathaniel, who was now a businessman, to London. It was thought that a sea voyage might improve her health. Thirty-nine of her poems were published in London as Poems on Various Subjects, Religious and Moral. It was the first book published by a black American. In 1775 Phyllis wrote a poem extolling the accomplishments of George Washington and sent it to him. He responded by praising her talents and inviting her to visit his headquarters. After both of her benefactors died in 1777, and Mary died in 1778, Phyllis was freed as a slave. She married in 1778, moved away from Boston, and had three children. But after the unhappy marriage, she moved back to Boston, and died in poverty at the age of thirty.

According to the passage, how many slaves did the Wheatley’s have

A．One.

B．Two.

C．Three.

D．Four.
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单项选择题

施工图设计的最后一道工序是( )。

A．设计文件评审

B．设计过程检查

C．设计文件会签

D．设计成果鉴定
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