题目

第一节 完形填空(共15小题；每小题2分．满分30分)        阅读下面短文，掌握其大意．然后从1—15各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。        Carmen’s mother Maria had just survived a serious heart attack. But without a heart transplant(移植)her life was in constant   1     .         Both the mother and daughter knew that the chances were very small: finding a donor heart that   2      Maria’s blood type could take years. However, Carmen was determined to save her mothe如图，点P是∠BAC的平分线AD上一点，PE⊥AC于点E．已知PE=3，则点P到AB的距离是（　　）A．3B．4C．5D．6