以下构成时效中止的原因是（） ["起诉","承认","部分履行","不可抗力"]
浓硝酸与水反应（）与之接触的可燃物。 ["A.放热，能点燃","B.放热，不能点燃","C.吸热，能点燃","D.不确定"]
A distance piece, known as a （） may be interposed between the rod and the bearing housing. ["bearing shell","bearing liner","compression plate","lead wire"]
“对价”一词是以下哪一国的法律术语（） ["德国","美国","法国","英国"]
GB/T19001-2015标准中8.2.3条款的要求针对的是（） ["与产品和服务有关要求的评审","供方的评审","合同规定要求的评审","设计评审"]
研究鱼类性别控制的意义是什么？
