单项选择题

What does the passage mainly discuss

A．The influence of ice on the diet.
B．The development of refrigeration.
C．The transportation of goods to market.
D．Sources of ice in the nineteenth century.

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单项选择题

The author describes Thomas Moore as having been on the right track (Lines 1-2, Para. 3)to indicate that______.

A．the road to the market passed close to Moore's farm
B．Moore was an honest merchant
C．Moore was a prosperous farmer
D．Moore's design was fairly successful

单项选择题

According to the information in the second paragraph, an ideal icebox would______.

A．completely prevent ice from melting
B．stop air from circulating
C．allow ice to melt slowly
D．use blankets to conserve ice