轿厢内指层灯设置在轿厢内，显示其运行（）的装置。
A、方向
B、层站
C、层站和方向
D、呼梯方向
参考答案：C
—I wonder what makes you a successful manager.
—I ________ as a waiter for five years，which contributes a lot to my today’s work.
A．serve
B．have served
C．had served
D．served
“雅尔塔体制”对于世界政治有何意义？
