冲击地压矿井必须根据本矿（）、可能发生冲击地压灾害的类型、危害程度，建立矿井基本情况和冲击地压灾害数据库。
参考答案：地质条件、采掘工作面条件
研究响尾蛇捕食老鼠的实验设计中需要几只死老鼠（ ）
A．一只
B．两只
C．三只
D．数量不限
A neonate receives an Apgar score at 1 and 5 minutes after birth. The 5-minute Apgar score is more predictive for which of the following
A．Residual neurologic damage.
B．Residual respiratory depression.
C．Congenital heart defects.
D．Gestational age of the neonate.
