The Na+ and Ca2+ in the vermiculite interlayer is exchangeable, and K+ in the phlogopite interlayer is unexchangeable. 研究表明,水黑云母中蛭石晶层的Na~+、Ca~(2+)是可交换的,而云母晶层的K~+基本上是不可交换的。
Thirdly, on the foundation of Black-Scholes model, selecting different models for the appraisal of exchangeable and unexchangeable intangible assets respectively; 然后,在Black-Scholes期权定价模型的基础上,对可交易和不可交易无形资产分别选用不同的估价模型;
Since Chinese ownership de-settlement transformation started, a large amount of unexchangeable shares have been transformed into exchangeable shares. It is allowed for the state shareholders and institutional shareholders to exchange their shares in the secondary market. 自从我国股权分置改革开始,大量的非流通股转为流通股,允许国有股以及法人股股东所持有的非流通股在二级市场上流通交易。