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>> 成人高等教育 / 计算机应用基础
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佳题速递：
21、计算机安全属性中的可用性是指_______。
A.得到授权的实体在需要时能访问资源和得到服务
B.网络速度要达到一定的要求
C.软件必须功能完整
D.数据库的数据必须可靠计算机统考 已知圆锥被切割后的主、俯视图，正确的左视图是( )(A)(B)(C)(D)工程制图 经济数学基础 27、In earlier days few people read Whitman's poems. One person who did read them was Abraham Lincoln who was then a country lawyer. He liked the strength and honesty of Whitman's words. He often read them to visitors in his office. Whitman didn't know Lincoln, but he wrote a long article about slavery. Whitman was against slavery. He wanted to see a new kind of president, not a professional politician, but an ordinary working man. This man would be wise, healthy and middle-aged. He would have a beard. Whitman didn't know it, but he was describing Lincoln. Before he was a lawyer, Lincoln worked with his hands. He was wise, healthy and middle-aged, and he had a beard.
In 1860 Abraham was elected the president of the United States. In March 1865, Whitman was in Washington. Abraham Lincoln became president for the second time. Whitman watched the ceremony. The two men had never met but they had seen each other. Washington was very hot in summer. Sometimes Lincoln went outside the city. He passed Whitman's house on the way. He and Whitman often nodded to each other.
Early in April the civil war ended. But on April 13 someone shot President Lincoln, and on 14 Lincoln died. To Whitman it was like the death of a friend. He loved Lincoln so much. He wrote a poem to express his feelings about the death of the president. It was one of his saddest and most beautiful poems.统考英语阅读理解 Lily is studying political recently. 大学英语（2） 高等数学2