人民警察判明有()的紧急情形,经警告无效的,可以使用武器。
A、抗拒或者阻碍人民警察依法履行职责
B、聚众赌博
C、结伙抢劫或者持械抢劫公私财物
D、拐卖妇女儿童
参考答案:C
HiCN最大吸收峰的波长是()
A.535nm
B.538nm
C.540nm
D.545nm
E.550nm
The emperor turned to alchemy to ensure immortality, but contrary to his wishes, the wrong chemistry shortened his life.
A.good fortune
B.quick recovery from his illness
C.never-ending life
D.everlasting peace