export class Course {
    /**练习类型:01-文本， 02-音频， 03-图片 */
    type: string;

    text: string;

    picUrl: string;

    audioUrl: string;

    picArr: [];

    colorArr : [];
}

export class Picture {

    picUrl: string;

    color: string;
}

export class Color{
    val : string;
}