What prevents May, aged 25, becoming an air hostess（）
A. She once broke a traffic law and was fined.
B. She can't speak Japanese very well.
C. She has never before worked as an air hostess.
D. She doesn't feel like working long hours flying abroad.
下列哪项是预防溶血反应的措施( )。
A. 严格执行无菌操作
B. 输血前肌注异丙嗪
C. 做好血液质量检查
D. 输血前静注10%葡萄糖酸钙
E. 输血前静注地塞米松
They had wanted to help but ______ get there in time.
A. can't
B. couldn't
C. don't
D. won't
属热疗适应证的是( )。
A. 急性阑尾炎
B. 鼻翼旁疖肿
C. 牙痛
D. 急性乳房炎
E. 软组织挫伤10小时内
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