曝光就是在照相机快门开启的瞬间，光流进入暗箱，使胶卷上的（）接受一定量的光量子的过程。
参考答案：卤化银
The habit is something that someone does repeatedly and often does not ________ because they have done it so many times before.
A．know
B．understand
C．experience
D．realize
（）是裁剪服装的依据。
A.原型图
B.效果图
C.款式图
D.结构图
