The system has been designed to give students quick and easy ______ to the digital resources of the library. A. passage B. way C. approach D. access 答案:D关于条形磁铁,下列说法错误的是A. 把它悬挂起来,自由转动,静止时总是一端指南,一端指北B. 它的磁性是两端最强,中间最弱C. 把它分成2段,每段均各有两个磁极D. 把它分成2段,每段只有一个磁极