以下关于对称密钥加密说法正确的是：
C
暂无解析
包过滤技术与代理服务技术相比较
LCL—FCL货物交接的运输条款包括( )。
My sister wasn't in Paris last month ,so you _____her there.
We desire to establish _____ beneficial business relations.
Most of the people in the group felt rather disappointed at their travelling abroad.They say that it _______better organized.
What is the main advantage of radio ads : （）
Nora: How long has this bookshop been in business?
Michel: ______1982.
CIP术语中买卖双方风险转移在( )。
Let's go swimming,_______?
信用证装运期是指( )。
Mrs.London has____that she is unable to get a job.