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问题 问答题

EXCEL图表的构成元素有哪些

答案

参考答案：EXCEL图表包含以下元素：
(1) 轴，即坐标轴，X轴、Y轴，三级图表还有一个Z轴。
(2) 图表标题，每个图表有一个标题，表示该图表的名字。
(3) 轴标题，每个轴上都有一个标题，用以表示该轴方向所代表的数据内容。
(4) 图例，表示各数据系列的颜色及图案的列举说明。
(5) 数据系列，指图表中要表现的数据集合，图表中以相同颜色或图案表示的一组数据即为一个数据系列。
(6) 网络线，平行于各轴的、便于读数的参照线。
(7) 类，数据系列赖以分类的项，即X轴的标题。

单项选择题 A型题

属于缺陷病毒的是（）

A.HAV

B.HBV

C.HCV

D.HDV

E.HEV
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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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