在OSPF中有重传机制的报文有()。
A.HELLO
B.DD
C.LSR
D.LSU
E.LSAck
参考答案:B, C, D
下列各组物质中,都属于难溶于水的物质的一组是( )
A.AgNO3,BaSO4
B.MgCO3,NaNO3
C.Fe(OH)3,AgCl
D.NH4NO3,CaCl2
Any dispute arising from duty payment between the auditee and the Customs should be dealt with in accordance with the provision laid down in the ______.
A. Regulations on Customs External Auditing of the People's Republic of ChinaB. Customs law of the People's Republic of ChinaC. Regulations on Import and Export Tariff of the People's Republic of ChinaD. Both B and C