1¡¢ÒÑÖª¼¯ºÏM£½{(x£¬y)|x£«y£½3}£¬N£½{(x£¬y)|x£­y£½5}£¬ÄÇô¼¯ºÏM∩NΪ ( )
A¡¢x£½4£¬y£½£­1 B¡¢(4£¬£­1) C¡¢{4£¬£­1} D¡¢{(4£¬£­1)}
2¡¢ÒÑÖª £¬Ôò µÄֵΪ£¨ £©
A¡¢100 B¡¢10 C¡¢£­10 D¡¢£­100
3¡¢ÏÂÁк¯ÊýÖУ¬Ó뺯Êýy = x ( x≥0 ) ÏàͬÊÇ £¨ £©
A¡¢ y = B¡¢ y = ( )2 C¡¢ y = D¡¢ y =
4¡¢ÏÂÁÐÃݺ¯ÊýÖйýµã £¬ µÄżº¯ÊýÊÇ ( £©
A¡¢ B¡¢ C¡¢ D¡¢