药品生产企业必须遵守
A.处方药与非处方药B.C批准上市药品C.毒麻药品D.传统中药E.新药
参考答案:C
Document outputs are produced on ______, devices that produce text or images on paper.
A.display and keyboard B.mouse and keyboardC.scanners and plotters D.printers and plotters
杆塔所承受的导线质量为()。
A.两相邻杆塔间的导线质量之和;
B.杆塔两侧相邻杆塔间的导线质量之和;
C.相邻两档距中两弧垂最低点之间的导线质量之和;
D.两相邻档距导线质量之和的1/2。