题型:填空题 Because of the Russian gas limit to Europe, attempts _______ to use botanical fuel as a source of power.A.have madeB.having madeC.are being madeD.will be making 查看答案
题型:填空题 “已取得计量认证合格证书的产品质量检验机构,需新增检验项目时,应按照有关规定,申请单项计量认证”是( )中对“扩项”的规定。A.《产品质量法》B.《计量法》C.《标准化法》D.《计量法实施细则》 查看答案