0w ing ____ unu sual shortage of stock, this offer is made, subject to the goods being un sold.

上消化道出血病因诊断的首选检查方法是___________。

免疫B细胞在___中发育成熟。

8421码是一种____码，余3码是一种____码。

接受化疗后最常见的毒性反应是 _________、_________、_________.

政策评估都需要经过（）、（）和总结与报告三个环节

护患关系的特点：____________、________和关系的人文性。

To trade ____ the people of all eoun tries ____ the basis of equality and mutual ben efit is our established policy.

He can not choose his own job, ________ can I.

没有现成答案的问题，一般都可以归之于____问题。