单项选择题

According to the passage, which of the following is used in explaining a muscle movement

A．The flow of blood to the muscles.
B．Classical conditioning.
C．Protein interaction.
D．Stimuli through the cells.
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单项选择题
Which of the following is most clearly analogous (类似的) to the example of the person who fears dogs
A．A child chokes on a fishbone and as an adolescent he is reluctant to eat fish.
B．A person feels lonely and after a while he buys a dog for a companionship.
C．A child studies science in school and later grows up to become a teacher.
D．A person hears that a snowstorm is predicted and in that evening is afraid to drive home.
单项选择题
Which of the following is the type of scientific explanation most likely used by a molecular biologist
A．Argumentation.
B．Deduction.
C．Reduction.
D．Generalization.
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