题目

Many of them turned a deaf ear to his advice, they knew it to be valuable. A. as if                        B. now that C. even though          D. so that 答案:【解析】选C。考查连词意义辨析。句意:他们中的许多人对他的建议充耳不闻, 尽管他们知道它有价值。even though即使, 尽管, 引导让步状语从句。as if好像; now that既然; so that为了。已知圆C经过点M(0,-2),N(3,1),并且圆心C在直线上x+2y+1=0.(I)求圆C的方程;(II)过点P(0,1)的直线l与圆C交于A、B两点,若,求直线l的方程.
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