题目
A.fresh water
B.fresh air
C.salt water
D.artificial respiration
第1题
What can cause a lack of oxygen in a chain locker ________.
A.Absorption
B.Osmosis
C.Evaporation
D.Oxidation
第2题
Hunger is caused by ______.
A.too much food and water in the body
B.a lack of oxygen in the blood
C.seeing or thinking about food
D.a lack of certain chemicals in the blood
第3题
Hunger is caused by ______.
A.too much food and water in the body
B.a lack of oxygen in the blood
C.seeing or thinking about food
D.a lack of certain chemicals in the blood
第4题
Hunger is caused by ______.
A.too much food and water in the body
B.a lack of oxygen in the blood
C.seeing or thinking about food
D.a lack of certain chemicals in the blood
第5题
Self-contained breathing apparatus is used to ______.
A.make underwater repairs to barges
B.determine if the air in a tank is safe for men
C.enter areas that may contain dangerous fumes or lack oxygen
D.resuscitate an unconscious person
第6题
What did the seven Russian submariners suffer from?
A.A lack of oxygen and low temperature.
B.Heavy fever.
C.Faint and headache.
D.Hunger and cold.
第7题
What did the seven Russian submariners suffer from?
A.A lack of oxygen and low temperature.
B.Heavy fever.
C.Faint and headache.
D.Hunger and cold.
第8题
What did the seven Russian submariners suffer from?
A.A lack' of oxygen and low temperature.
B.Heavy fever.
C.Faint and headache.
D.Hunger and cold.
第9题
A.曲轴
B.活塞销
C.飞溅
D.专设喷嘴
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