大学的青春时光,人生只有一次,应该好好珍惜。为学之要贵在勤奋,贵在钻研,贵在有恒。A person enjoys only once the youthful days at college so you should 1.___ them . To 2.__knowledge one has to study 3.__and 4.__.(intensive,acquire,persistent,cherish,diligent) 答案 inten...