At sea, we usually use() to provide hot water.
A. a heater
B. an exhaust gas boiler
C. an engine
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_______ is NOT included in the factors used in analyzing vowels。
A. Position of the tongue
B. Shape of lips
C. Openness of the mouth
D. Openness of the vocal cords
核动力厂人员必须接受处理()的教育。
A. 运行瞬变
B. 预计运行事件
C. 设计基准事故
D. 超设计基准事故
关于膜剂的叙述，不正确的是
A. 可供多种给药途径应用
B. 适用于剂量小的药物
C. 聚乙烯醇是常用的成膜材料
D. 甘油可增强膜剂的塑性
E. 仅起局部治疗作用
The reception of weak radio signals may be improved by“opening up”the squelch control.What
A. Just past the point where background noise is cut off
B. Completely closed with the volume at the highest level
Completely open with the volume at the lowest level
D. None of the above
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