近水平煤层倾角应为()。
A.45°以上
B.25°--45°
C.8°以下
参考答案:C
Right in front of the temple gate _______ known as Peak Flying From Afar.
A.is standing a very big rock
B.a very big rock is standing
C.stands a very big rock
D.a very big rock stands
有关产科麻醉,下列说法错误的是()
A.氟烷和氧化亚氮合用可减轻对子宫收缩力的影响
B.恩氟烷和异氟烷在浅麻醉时对子宫抑制不明显,对胎儿也无明显影响
C.氟烷禁用于经 * * 分娩
D.吸入麻醉药均有和剂量相关的抑制子宫收缩的作用
E.乙醚深麻醉时子宫肌张力完全消失,且对缩宫素不起反应