北京希电公司生产的PCM复用设备最多可提供()路以太网接口。
A、4
B、6
C、8
D、10
参考答案:B
需求量的变动率大于价格的变动率,则需求弹性系数()。
A.=1
B.>1
C.<1
D.无法判断
Changling, the largest of the Ming Tombs, is at the heart of Shisanling, with the other tombs _____ on either side of it.
A.placing
B.to place
C.placed
D.being placed