在四部门经济中,如果用支出法衡量,国民生产净值等于C+I+G+X-M。()
A. 正确
B. 错误
将待浸焊器件浸入装有焊料的槽内()后,开启振动器。
A. 1S
B. 2S
C. 5S
D. 2-3S
Which of the following is true regarding Label Distribution Protocol (LDP)?()
A. It is a label distribution protocol for MPLS
B. It is a set of procedures and messages by which LSRs establish Label Switch Paths (LSPs) through a network
C. Tag distribution Protocol (TDP) was the basis for LDP
D. All of the above are true
在受众层次、分布、年龄、接受成本和方便性等方面具有显著优势的媒介是()。
A. 报纸
B. 杂志
C. 广播
D. 电视