彩色电视机在显示黑白图像时，要求在任何灰度下三基色荧光粉所合成的光都只呈现（）图像，而不应出现其它（）。
参考答案：黑白、色彩
《法律援助条例》规定：对羁押的犯罪嫌疑人的法律援助申请，看守所应该在( )内转交法律援助机构。
A．3天B．7天C．12小时D．24小时
What are they doing [A] They are listening to a piece of music. [B] They are writing a book about the moon. [C] They are studying the life of Beethoven.
