1.ƽÐÐËıßÐÎ ÖУ¬ £¨ £©
A£® B£® C£® D£®
2£®º¯Êýy£½2cos2x£­π4£­1ÊÇ( )
A£®×îСÕýÖÜÆÚΪπµÄÆ溯Êý B£®×îСÕýÖÜÆÚΪπµÄżº¯Êý
C£®×îСÕýÖÜÆÚΪπ2µÄÆ溯Êý D£®×îСÕýÖÜÆÚΪπ2µÄżº¯Êý
3£®º¯Êý ͼÏóµÄÒ»Ìõ¶Ô³ÆÖá·½³ÌÊÇ( )
A£® B£® C£® D£®
4£® µÄֵΪ£¨ £©
A£® B£® C£® D£®