阅读短文，判断正误。
Hello. I am Alice. I am eight. I have a dog. His name is Sam. He is brown. He is very lovely. My mother and I like him. But my father doesn't like him. Sam likes eating meat. I like too.
航天飞机围绕地球一段时间后返回地面，在返回的过程中，下列说法正确的是（ ）
已知：如图，⊙O的半径为9，弦AB⊥半径OC于H，sin∠BOC＝23，则AB的长度为（ ）
