下齿槽神经阻滞麻醉时发生面瘫的原因是()
A.注射点过高
B.注射点过前
C.注射点过低
D.注射点过后
E.注射入血管内
参考答案:D
The poor little girl _______ so much since her parents died .
A.went through
B.has gone through
C.went over
D.has gone over
货舱通风的目的中,()可防止货物自燃。
A.降低舱内温度
B.降低舱内露点
C.提高舱内湿度
D.提供新鲜空气