单项选择题

A．280 pounds per square inch.
B．47 pounds per square inch.
C．40.7 pounds per square inch.
D．14.7 pounds per square inch.
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单项选择题
A．The heroic fight against the flood.B．The effects of the flood.C．The prices of vegetables and fruits.D．The cause of the flood.
A．The heroic fight against the flood.
B．The effects of the flood.
C．The prices of vegetables and fruits.
D．The cause of the flood.
单项选择题
A．In the wood pile.B．In the field.C．In the kitchen.D．In the backyard.
A．In the wood pile.
B．In the field.
C．In the kitchen.
D．In the backyard.
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