混合性牙瘤多见于()

A．下颌骨

B．上颌骨

C．双尖牙和磨牙区

D．前牙区

E．尖牙区

South Korea's defense mimstry said Wednesday it will strengthen defense readiness to     possible

provocation by the Democratic People's Republic of Korea,especially in the wake of the death of its

top leader Kim Jong-il. [ ]

A. pick up      

B. figure out      

C. fight against      

D. break into