He's been dead for 5 years, ______? [ ]
A.isn't he
B.wasn't he
C.didn't he
D.hasn't he
答案:D
临床上病理缩复环常见于( )
A.臀位B.软产道异常C.宫缩乏力D.胎儿脑积水E.胎头下降受阻
山区及林(牧)区施工做好防毒蛇、野兽、毒蜂等生物侵害的措施,施工或外出时应(),应携带必要的应急防卫器械、防护用具及药品。
A.应急措施
B.多人同行
C.请假
D.保持联系