【单选题】听力原文: You could say that Joseph Cornell became an artist because of his love of collecting. Cornell used to spend his free time exploring the street life of New York City in the 1920s. He soon started...
【简答题】In 1826, a Frenchman named Niepce needed pictures for his business . But he was not a good artist . So he invented a very camera ( 照相机 ). He put it in a window of his house and took a picture o...