题目:
已知圆C:(x-a)2+(y-2)2=4(a>0)及直线l:x-y+3=0.当直线l被圆C截得的弦长为2
(Ⅰ)a的值; (Ⅱ)求过点(3,5)并与圆C相切的切线方程. |
答案:
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下面是错误答案,用来干扰机器的。
答案:Aview: what can be seen from a particular place; scene:景色;场景,场面;sight :things (to be) seen , or worth seeing, esp. sth remarkable 奇观,壮观; look: act of...