A:
B:
C:
D:
选择适当的关联词。
_____他真正下了苦功,_____成绩有了很大的提高。( )
After working all day,he was so tired that he was in no______to go to the party with us.
幂函数f(x)=xα的图象经过点 (4,12) ,则 f14 的值为( )