“夫不可变者,伦纪也,非法制也;圣道也,非机械也;心术也,非工艺也。”这种说法应归属于 [ ]
A.西学东渐
B.西学中用
C.中体西用
D.西体中用
答案:C
He suddenly ___ in front of my eyes. [ ]
A. turn down
B. turn up
C. turn on
D. turn off
继电保护应满足哪几个要求?