皮肌炎主要侵犯下列哪个部位()
A.横纹肌
B.平滑肌
C.肝脏
D.肾脏
E.脾脏
参考答案:A
散剂查检主要的项目是
A.粒度
B.均匀度
C.装量差异
D.干燥失重
E.药物含量
()provides a paper trace of course steered by the vessel against time.
A.The echo sounder
B.The radar
C.The course recorder
D.The direction finder