课题论证是指对所选课题及课题研究的_______________进行评价性研究的过程。重大的课题要进行两次论证，除了_______________外，往往还须_______________。

According to the shipping _____ it will be impossible for us to ship the goods in October.()

选题包括两方面含义：一是确定_______________，二是确定_______________。

国家在涉及下列事项的诉讼中可以援引管辖豁免的是()。

选题是指经过选择来确定所要研究的问题，包括_______________和_______________。

We shall advise you by cable as soon as the goods ____ .)

小学教育研究的基本特点是：_________________、________________和为了实践。

Please see to it that the goods we ordered are shipped as soon as the covering letter of credit ____ you.( )

教育研究应分析和把握教育问题的三个纬度是___________、___________和___________。

Since the premium varies with the scope of ____ extra premium is for buyer ' s account, should additional siske covered?( )