下列物质中,既能发生酯化反应,又能发生加成反应的是( )
A、<img src="//wximg.233.com/attached/image/20120928/2012092814277238723jpg" alt="" border="0" />
B、<img src="//wximg.233.com/attached/image/20120928/2012092814275995599jpg" alt="" border="0" />
C、<img src="//wximg.233.com/attached/image/20120928/2012092814273645364jpg" alt="" border="0" />
D、<img src="//wximg.233.com/attached/image/20120928/2012092814278768876jpg" alt="" border="0" />
物理化学综合