题目

In some places, Chinese people also eat eggs on their birthdays. They are a _____ of life and good luck. A.nameB.symbolC.jokeD.experience   答案：B下列现象不能用光的直线传播来解释的是（　　）A．一叶遮目不见泰山B．在平静的水面上形成树木的倒影C．日食、月食现象D．我们不能看到站在墙后的人