【判断题】无线通信的三种常见“效应”是:阴影效应、远近效应、多普勒效应。其中级,阴影效应属于慢衰落,多普勒效应属于快衰落。( )
【判断题】无线通信的三种常见“效应”是:阴影效应、远近效应、多普勒效应,其中,阴影效应属于慢衰落,多普勒效应属于快衰落( )
【简答题】无线通信的三种常见“效应”是: 、 、 ;
【简答题】A.About four years. B.Last year. C.Three years ago. D.In 1998.
【单选题】骨盆入口平面轻度狭窄试产的护理措施,错误的是
【单选题】某产妇,27岁。足月临产,因骨盆入口平面轻度狭窄予以试产,护理措施错误的是
【单选题】根据《票据法》规定,银行汇票的提示付款期限自
【单选题】The statement 'The decline leveled off four years ago' (Last line, paragraph 2 implies that ______.
A.
the number of children at boarding schools dropped sharply tour years ago
B.
many boarding schools had to close four years ago
C.
the changing of the number of the pupils in the boarding school became level after a sharp declining four years ago
D.
more and more parents tended to send their children to some private school other than the boarding ones
【单选题】根据票据法律制度的规定,银行汇票的提示付款期限是: