在国际贸易中，海运提单的签发日期是指()。
______our catalogues for your reference.
When the seller receives the buyer’s counter-offer, and he finds some terms and conditions unacceptable to him, he will state his own opinions in a letter, which is called as _____。
在技术的生命周期的发展阶段，多以蓝图、原理等形式表现，技术的公开程度较大，多以专利等形式加以保护，所以技术的价格()。
Our customers find your goods quite ______.
