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(本小题满分9分) 如图所示，菱形ABCD的顶点A、B在x轴上，点A在点B的左侧，点D在y轴的正半轴上，∠BAD=60°，点A的坐标为(－2，0)． ⑴求线段AD所在直线的函数表达式． ⑵动点P从点A出发，以每秒1个单位长度的速度，按照A→D→C→B→A的顺序在菱形的边上匀速运动一，设运动时间为t秒．求t为何值时，以点P为圆心、以1为半径的圆与对角线AC相切？
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【简答题】Fill in the blanks with right forms of the following words or phrases: outrage deficient in hopes of in terms of appease appliance come up with ...
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【单选题】Read the following passage and identify the problem of reasoning.Top executives wear expensive clothes and drive nice cars. So, these things must be a key to success.
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