什么是静物摄影？
参考答案：
静物摄影是指对静止无生命力的物体的拍摄，主要通过构图、布局、光线与影调及色彩的处理来表现被摄体的质感、立体感及外在特征。
下列哪条不是儿童注意力缺陷多动障碍的病因（）
A.遗传因素
B.环境因素
C.生物因素
D.疲劳
E.以上都不是
—We were surprised to hear that the reason_______ she gave for her absence was______ her mother was ill.
—Yes，we saw her mother was at the supermarket that morning.
A．why；that
B．which；that
C．that；because
D．why；because
