题目

阅读下面短文，根据短文内容判断句子的正误。正确的涂“A”，错误的涂“B”。（共4小题，每小题2分；计8分）When I was a boy, I didn't have any hair on my head. So I was very shy. I liked to watch my friends play in the park. Sometimes I would join them, but most of the time I just watched them play.Every day, we would see an old man walking in the park. He had big ears and no hair. We thought he was dumb (哑的). Every time when my friends saw him, they would say loudly, Hey, Mr. Dumb, what's the time?” But they got no answer.One early evening, I wa若函数f（x）=2sinωx（ω＞0）在上单调递增，则ω的最大值为    ．