1. Èô £¬Ôò µÄÖµÊÇ
£Á£® ¡¡¡¡¡¡¡¡¡¡ £Â£® ¡¡¡¡¡¡¡¡¡¡¡¡£Ã£® ¡¡¡¡¡¡¡¡¡¡¡¡£Ä£®
2. ·½³Ì2x£¨x£­3£©=7£¨3£­x£©µÄ¸ùÊÇ
A. x=3 B. x= C. x1=3£¬x2= D. x1=3£¬x2=£­
3£®¼ÆË㠵Ľá¹ûÊÇ
A£®2 B£® C£® D£®1
4. ÓÃÅä·½·¨½â·½³Ì£ºx2£«6x£«7£½0£¬ÏÂÃæÅä·½ÕýÈ·µÄÊÇ
A£®£¨x£«3£©2£½£­2 B£®£¨x£«3£©2£½2 C£®£¨x£­3£©2£½2 D£®£¨x£­3£©2£½£­2
5£®Èçͼ£¬ÒÑÖª¡ÑOµÄÖ±¾¶ ¹ýÏÒ µÄÖе㠣¬∠EOD=60°£¬Ôò µÈÓÚ
£Á£® £Â£® £Ã£®30° £Ä£®