Interest is as to learning as the ability to understand, even more so.
A. typical
B. specific
C. vital
D. available
网友回答
A. typical
B. specific
(答案→)C. vital
D. available
解析：A. typical：典型的；B. specific：特殊的；C. vital： 重要的；D. available：可获得的、可利用的。题意：兴趣与理解能力对于学习同等重要，甚至更为重要。故C项正确。