问题
单项选择题
北京国基RADWIN无线网桥调试时出现一声较长蜂鸣，说明是（）
A.状态变坏
B.无连接
C.同步丢失
答案
参考答案：C
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北京国基RADWIN无线网桥调试时出现一声较长蜂鸣，说明是（）
A.状态变坏
B.无连接
C.同步丢失
参考答案：C
My name is Bill. I'm an American boy. I'm twelve. I'm a student of a middle school. I'm in . Li Lei is my friend. We're in the class. He is eleven Here is a picture of his family! look at it. His father, the one behind the tree, is a policeman His mother, the one in the red hat, is a Chinese teacher. He has two sisters. They are twins. Their names Fang Fang and Fang Ling. They have a cat. name is Mimi. Look! It's the floor under the table. The twins are middle school students, too. They are in different . We are good friends. They often look after me at school. After ,we often chat each other. The twins like doing sports, and they are good at playing volleyball. I want them to be happy forvever（永远）
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