逆行肾盂造影的禁忌证是下列哪项()
A.碘过敏者
B.下尿路感染者
C.静脉尿路造影显影不满意者
D.肾功能严重损害者
E.肝功能严重损害者
参考答案:B
Though she was young, she ______ her most time ______ the children in remote areas. [ ]
A. devotes; to teach
B. devoted; to teach
C. devoted; to teaching
D. is devoted; to teaching
编写教科书的直接依据和国家衡量各科教学的主要标准是()。
A.课程
B.课程标准
C.课程计划
D.课程目标