在⊙O中，AB、CD是两条相等的弦，则下列说法中错误的是（　　）

下列函数是一次函数的是（　　）

    Look at this desk. It's Jim's desk. It's brown. Jim's book is on it. The book is his English book. His pencil-box is on it, too. His pencil is in his pencil-box. But where's his pen? He can't find(找到) it.