The students in our school have ________ days off and spend _________ time doing their homework.

A．less; less

B．less; fewer

C．more; less

D．more; fewer

火力发电厂中，下列哪几种接线在发电厂与变压器之间宜装设断路器和隔离开关？（）

A.两台50MW发电机与一台双绕组变压器作扩大单元连接

B.110MW发电机与自耦变压器为单元连接

C.125MW发电机与三绕组变压器为单元连接

D.200MW发电机与双绕组变压器为单元连接