德尔菲预测法
参考答案：
这种方法是聘请7—20位专家，由预测主持人与他们建立关系，不让专家之间相互知晓，避免专家间的相互影响。
下列多项式能因式分解的是[ ]
A．m2﹣n
B．y2+2
C．x2+y+y2
D．x2﹣6x+9
The nurse is speaking to grieving parents after a sudden infant death syndrome (SIDS) death. What should the nurse emphasize to the parents（）
A. The death couldn’t have been prevented and isn’t the parents’ fault.
B. The parents must allow an autopsy to confirm the diagnosis.
C. The parents are still young and can have more children.
D. The parents should place other infants on their backs to sleep.
