流通国债是指可以在流通市场上交易的国债，它具有()的特点。
A、自由转让
B、主要吸纳储蓄资金
C、短期性
D、自由认购
参考答案：A, D
- What's up? You didn't pick up the phone just now.
- I'm sorry that I dancing with music on, but it's done now.
A．practised
B．was practising
C．am practising
D．have practlised
综采面端头支护方式有哪几种？各适用于什么条件？
