数字化X射线成像系统的量子检测率可达()
A.60%以上
B.50%以上
C.20%以上
D.30%以上
E.40%以上
参考答案:A
Any dispute arising from duty payment between the auditee and the Customs should be dealt with in accordance with the provision laid down in the
A.regulations on Customs External Auditing of the peopli’s Republic of ChinaB.customs law of the People~ Republic of ChinaC.regulations on Import and Export Tariff of the People~Republic of ChinaD.Both B and C
细菌嘧啶核苷酸生物合成途径的反馈抑制是由于控制了下列哪种酶的活性
A.乳清酸磷酸核糖转移酶
B.二氢乳清酸酶
C.天冬氨酸氨基甲酰转移酶
D.胸苷酸合成酶
E.二氢乳清酸脱氢酶