（）干粉驱动系统适用于小型干粉消防车，如干粉摩托车等。
A、氮气
B、气体
C、燃气
D、二氧化碳
参考答案：D
根据句意及首字母（汉语）提示，补全单词。
1. The box is e ______. There is nothing in it.
2. My mother asked me to d______ what my new pen-pal was like.
3. Look! The f ______ are working in the fields.
4. Alice and Jim ______ (结婚) in church last week.
5. Be quiet, please. I have good news to ______ (宣布).
下述哪类病人硬膜外阻滞后血压下降幅度最大（）
A.产妇
B.子宫肌瘤病人
C.高血压病人
D.肥胖病人
E.糖尿病病人
