William Henry Harrison, the ninth President of the USA, was born in a small town. When he was a boy, he was very quiet and shy. Because he was so quiet, everyone thought that he wasn't bright. People in the town often put a nickel(五分镍币)and a dime(十分硬币)before him and asked him which to choose. He always chose the nickel and they laughed.

    One day a woman felt sorry for him. She asked, "Why do you never take a dime and always choose a nickel? Do you know a nickel is worth(值……钱) much less than a dime?"

    "Certainly I know it.” William answered slowly. "But if I choose the dime, they will not ask me to choose them any more.”

下列各项试图说明用鼻呼吸比用口呼吸好，但有一项与此不符，应该是（　　）

作为新文化运动的领导人之一,陈独秀曾被人们称为“中国思想界的清道夫”。他把“启蒙之水”洒向那“孔孟弥漫的大道上”。材料中的“启蒙之水”是指（   ）