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>> 成人高等教育 / 常微分方程
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佳题速递：
46、在Windows文件夹窗口中共有45个文件，其中有30个被选定，执行“编辑”菜单中“反向选择”命令后，被选定的文件个数是______。
A.35
B.30
C.15
D.0计算机统考 25、A young boy was playing with a ball in the street. He kicked it so hard that it broke the window of a house and fell in. A woman came to the window with the ball and shouted _ _ 21 _ _ him, so the young boy ran away, but he wanted his ball back. A few minutes later, he came back and knocked at the door of the house. When the woman opened the door, he said, "My father is going to come up and mend your window very soon."
After a few minutes, a man came to the door _ _ 22 _ _ tool in his hand, so the woman let the boy take his ball away.
When the man finished mending the _ _ 23 _ _ , he said to the woman "You have to _ _ 24 _ _ me ten pounds." "But aren't you the _ _ 25 _ _ of that boy?" the woman asked. She looked surprised. "No," he answered. He was surprised, too. "Aren't you his mother?"统考英语完型填空 利用线路保护切除故障不需另外装设保护，简单、经济，但故障切除的时间一般较长。电力系统继电保护 为网络提供共享资源并对这些资源进行管理的计算机称为工作站。 A、正确 B、错误计算机应用基础 锋电位由顶点向静息电位水平方向变化的过程称为 生理学（影像） 下列矩阵运算结果仍然等于矩阵的是 高等数学三：线性代数
