He had hoped to tour the deserted temple for ____ fun but to his disappointment he didn’ t find ___ fun for doing that at all .

A．/; /

B．/; the

C．the; the

D．a; the

主变压器差动保护投入运行前测量负荷六角图是（）

A.用来判别电流互感器的极性和继电器接线是否正确

B.用来判别差动保护的差流回路是否存在差流

C.用来检查主变压器的负荷平衡情况

D.用来检查差动保护装置动作情况