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【简答题】
如图，在平面直角坐标系中，以坐标原点O为圆心，2为半径画⊙O，P是⊙O上一动点，且P在第一象限内，过点P作⊙O的切线与x轴相交于点A，与y轴相交于点B。 （1）点P在运动时，线段AB的长度也在发生变化，请写出线段AB长度的最小值，并说明理由； （2）在⊙O上是否存在一点Q，使得以Q，O，A，P为顶点的四边形是平行四边形？若存在，请求出Q点的坐标；若不存在，请说明理由。
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皮皮学刷刷变学霸
举一反三
【简答题】保险合同条款的解释原则中，按照保险合同条款通常的文字并结合上下文解释的原则是( )。 A文释原则 B意图解释原则 C学理解释原则 D补充解释原则
【单选题】Directions: Choose the right one from the four choices marked A, B, C or D. All tumours from AOM treated mice were _____ to histological examination after routine processing and haematoxylin ...
A.
subject
B.
subjected
C.
injected
D.
directed
【单选题】What are students encouraged to do nowadays at school?
A.
To master basic reading skills.
B.
To learn how to deal with tests.
C.
To read well in order to pass tests.
D.
To master all kinds of skills.
【单选题】All tumours from AOM treated mice were _____ to histological examination after routine processing and haematoxylin and eosin staining.
A.
subject
B.
subjected
C.
injected
D.
directed
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