乙车行驶的速度快
读美国和欧洲西部地区地形、气候图，完成下列问题。
①____ ②____
— Is there a reading room?
— Yes, .
You ______ go and see a doctor at once because you're got a fever.
如图，△ABC中，∠C=90°，AB垂直平分线交BC于D．若BC=8，AD=5，则AC等于____
