The driving force for steady-state diffusion is the __________.
A、(a) concentration gradient
B、(b) electric field
C、(c) temperature
D、(d) atomic oscillations
A、(a) concentration gradient
B、(b) electric field
C、(c) temperature
D、(d) atomic oscillations
It becomes clear from the text that the driving force(动力)behind green products is ______.
A.public caring for the environment
B.companies' desire for bigger sales
C.new ways of doing business
D.rapid growth of supermarkets
The lion represents those who are ______.
A.too trusting
B.strong and careful
C.reliant on force
D.lacking in intelligence
A、negative during the whole precess of breathing.
B、pulmonary pressure = atmosphere pressure - pulmonary elastic force
C、prevent venous return
D、the change of pulmonary pressure is the driving force for the pulmonaty ventilation.
E、might be negative during respiration.
What is the biggest driving force for the green build movement?
A.Legislation.
B.The need to cut costs.
C.Climate change.
D.Soaring fuel prices.
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