已知直角坐标平面上点P(3,-2)和Q(-1,6),则PQ=______.
∵P(3,-2)和Q(-1,6),
∴PQ=(3+1)2+(-2-6)2=45.
故答案为45.
—Did Jenny clean the whole house yesterday ?
—She because she was not quite herself .
A.hadn’t cleaned it
B.had it cleaned
C.had cleaned it
D.cleaned it
其他丝及绢丝制簇绒织物