妇科腹部手术行硬膜外麻醉时,术后至少需要去枕平卧__________小时。
参考答案:6
Thanks to the timely treatment, the patient _______ people all thought would die slowly recovered.
A.which
B.whom
C.who
D.as
当分泌物中IgA缺陷时,哪种免疫球蛋白可结合分泌片替代IgA()
A.IgE
B.IgG
C.IgD
D.IgM
E.IgA