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（本小题满分8分） 已知直线 的方程为 ，圆 的极坐标方程为 ． （Ⅰ）将圆 的极坐标方程化为直角坐标方程； （Ⅱ）判断直线 和圆 的位置关系．
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【简答题】阅读理解。 Are morning people born or made? In my case it was definitely made. In my early 20s, I rarely went to bed before midnight, and I would almost always get up late the next moming. But after a whil...
【单选题】Section A Directions: This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. The dialogues and the...
A.
Her bicycle was broken.
B.
She got up late.
C.
The bus was late.
D.
There was something wrong with the car.
【简答题】写出下列元素基态原子的电子结构式,并给出原子序数、元素名称和符号。 第 4 个稀有气体;( 2 )第四周期的第 6 个过渡元素;( 3 ) 4p 轨道半充满的元素;( 4 )电负性最大的元素。
【简答题】Are morning people born or made? In my case it was definitely made. In my early 20s, I hardly went to bed before midnight, and I would always get up late the next morning. But after a while I couldn’t...
【判断题】低版本的AUTO CAD没有办法打开高版本的AUTO CAD绘制的文件。例如:用AUTO CAD 2012打不开用AUTO CAD 2019绘制的设计图。
A.
正确
B.
错误
【简答题】试写出下列元素基态原子的电子结构式,并给出原子序数和元素名称: ( 1 )第 4 个稀有气体元素; ( 2 )第四周期的第 6 个过渡元素; ( 3 ) 4p 轨道半充满的元素; ( 4 )电负性最大的元素; ( 5 ) 4f 轨道填充 4 个电子的元素。
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