∵52-i=5(2+i)(2-i)(2+i)=5(2+i)5=2+i，
∴52-i=2+i，
故选D．
—Did you enjoy staying with your friend last week, Lily?
—Yes. I _______ with him for a long time.
A．haven’t stayed
B．didn’t stay
C．hadn’t stayed
D．wouldn’t stay
痢疾大便呈
A．脓血便B．果酱样便C．米泔水样便D．柏油样便E．白陶土样便
