若z是实系数方程x2+2x+p=0的一个虚根，且|z|=2，则p=（ ）。
4
甲型Ｈ1N1流感病毒的直径大约是0.000 000 081米，用科学记数法可表示为 。
Mother told me to play with our little guest. , though unwillingly.
A．So did I
B．I didn't
C．So I did
D．Neither I did
