The gas that is eliminated by the respiratory system is _______________.
A、chlorine
B、carbon dioxide
C、hydrogen
D、oxygen
A、chlorine
B、carbon dioxide
C、hydrogen
D、oxygen
What physiological reason for yawning is mentioned?
A.To exercise the jaw muscles.
B.To eliminate fatigue.
C.To get greater strength for attacking.
D.To gain more oxygen.
It is said that the gas company will raise the gas fare _____ 4%.
A、by
B、for
C、 from
D、 to
A.Compressed Natural Gas
B.Comprehensive Natural Gas
C.Comprehensive Neutral Gas
D.Compressed Neutral Gas
A、the gas diffusion rate is reversely proportional to the thickness of respiratory membrane.
B、the gas diffusion rate is proportional to the surface area of respiratory membrane.
C、increse of V/Q facilitate the gas exchange.
D、decrese of V/Q is not benefical to the gas exchange.
E、diffusion rate is proportional to the gas solubility.
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