He _______ the cave with a _______ candle to make it clear what it was. A. lighted; lighted B. lit; lit C. lit; lighted D. lighted; lit 答案:C 解析: light作谓语时其过去式是lit,而作定语时一般用lighted。设a=cos420°,函数f(x)=ax,x<0logax,x≥0,则f(14)+f(log216)的值等于( )
A、8B、7C、6D、5