已知命题p：关于x的方程x²-ax+4=0有实根；命题q：关于x的函数y=2x²+ax+4在[3，+∞）上是增函数，若“p或q”是真命题，“p且q”是假命题，求实数a的取值范围．

The good thing about children is that they __________ very easily to new environments. [ ]

A. adapt            

B. appeal          

C. attach        

D. apply