TDB18AE的EIU板卡RUN灯（）表示本版进入正常运行阶段之前。
参考答案：常亮
The poor ______ living in the mountain ____ top is covered with green trees.
A．are; which
B． are; of which
C．is; whose
D．are; whose
西施的结局一共有几种说法？（）
A.一种
B.二种
C.三种
D.四种
