题目

She spoke very confidently because she wanted to make a great       on her employer. A. influence            B. pressure          C. impression         D. Effect 答案：C 解析: 略如图，△ABC中，AB=AC，AD是∠BAC的平分线，DE⊥AB，DF⊥AC，垂足分别是E，F，则下列四个结论：（1）DE=DF；（2）线段AD上任一点到点C、点B的距离相等；（3）BD=CD；（4）∠BDE=∠CDF其中，正确的有A.1个B.2个C.3个D.4个