There were many ________ there.[ ]
A. backpacks
B. backpack
C. a backpack
答案:A
观察不同器官和部位彩色多普勒血流信号,哪项选择不妥
A.心脏、大血管选用2.5MHz探头
B.成人肝内门静脉:2.5~3.5MHz
C. * * :7~10MHz
D.甲状腺:7MHz
E.周围血管:2.5~3.5MHz
参保职工到经办机构申请计生津贴需提供资料?