单选题
Nine pieces of paper numbered consecutively from 1 to 9 are put into a hat．If one piece of paper is drawn a trandom from the hat，what is the probability that it will have an even number?
【正确答案】
C
【答案解析】把标号为1至9的9片纸放入一个帽子中，若从帽子中随机地抽出1片纸，它是偶数的概率为多少?
1至9中偶数有2、4、6和8共四个，那么随机抽出1张纸其标号为偶数的概率为[*]。
1至9中偶数有2、4、6和8共四个，那么随机抽出1张纸其标号为偶数的概率为[*]。