亮度调节
参考答案：使灰标中的最高灰阶显示适当的亮度，而灰标中的最低灰阶隐约可见，适当使室内光照度变暗，避免灯光直射屏幕。
按正确顺序填写序号。
( ) How do you know?
( ) I think it is too scary.
( ) That is a very bad movie.
( ) I like Drive a Car.
( ) Let's go to the movie theatre to watch a movie.
( ) I saw it last Sunday.
( ) No, I don't want to see that!
( ) What movie do you want to see?
设机罪码的长度为8位，已知X、Z为带符号的纯整数，Y为带符号的纯小数，[X]原+[Y]补+[Z]移=11111111，求出X、Y、Z的十进制真值为：X= (16) ，Y= (17) ，Z= (18) 。
A．-1
B．127
C．-127
D．1
