0w ing ____ unu sual shortage of stock, this offer is made, subject to the goods being un sold.
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Since the premium varies with the scope of ____ extra premium is for buyer ' s account, should additional siske covered()
A. assura nee
B. in sura nee
C. bus in ess
D. en terprises
按研究方法的适用范围和概括程度,教育科研方法可以分为____________方法、_____________方法和_____________方法
Our payment terms (付款方式)are ___ , irrevocable letter of credit for the full invoice value.()
A. con firmed
B. combi ned(联合)
C. committed
D. completed
教育研究与其他科学研究一样,由_______________、_____________和_______________三个基本要素组成