单项选择题

A．280 pounds per square inch.
B．40.7 pounds per square inch.
C．47 pounds per square inch.
D．14.7 pounds per square inch.
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单项选择题
A．Boric acid.B．Lozenges.C．Cough syrup.D．Penicillin.
A．Boric acid.
B．Lozenges.
C．Cough syrup.
D．Penicillin.
单项选择题
A．The heroic fight against the flood.B．The prices of vegetables and fruits.C．The effects of the flood.D．The cause of the flood.
A．The heroic fight against the flood.
B．The prices of vegetables and fruits.
C．The effects of the flood.
D．The cause of the flood.
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