单项选择题


Passage Three
Questions 32 to 35 are based on the passage you have just heard.

A．By good sense of water waves made by quarries.
B．By good sense of smell and electrical and magnetic power.
C．By good sense of light.
D．By good sense of blood.
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How many layers of wrapping must you remove before you can eat a chocolate
单项选择题
A．By using satellite images, maps, etc.B．By studying specific farming methods.C．By studying the variation of human population.D．By analyzing the quality of crops.
A．By using satellite images, maps, etc.
B．By studying specific farming methods.
C．By studying the variation of human population.
D．By analyzing the quality of crops.
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