下列何种造影剂是非离子型造影剂（）
A.碘克酸
B.泛影葡胺
C.胆影葡胺
D.优维显
E.碘苯酯
参考答案：D
—I can't find my seat. Could you show me, sir?
—________. May I see your ticket, please?[ ]
A. Sure
B. I agree
C. Good idea
D. It doesn't matter
UPS电池的选用应充分考虑电池的（）放电能力。
A.大电流
B.小电流
C.长时间
