百日咳鲍特菌在病程何期采标本检出率最高()
A. 潜伏期
B. 卡他期
C. 痉挛期
D. 恢复期
E. 全病程
A.At the railway stationB.At the airport.C.At the police station.
At the railway station
B. At the airport.
C. At the police station.
D. At the bank.
A.numerousB.countlessC.plentifulD.sufficient
A. numerous
B. countless
C. plentiful
D. sufficient
A.Boats were extremely crowded then.B.The current was too swift for boats to cros
A. Boats were extremely crowded then.
B. The current was too swift for boats to cross easily.
C. Bridges were too weak to carry the weight of a carriage.
D. Ferry service was infrequent.
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