当到达某一油温时,油品引火后所生成的火焰可以保持5秒钟,发生这种现象的最低油温称为()。
A.闪点
B.闪火点
C.自燃点
D.燃点
参考答案:D
I tried to telephone you, but I couldn't _____. [ ]
A. look through
B. go through
C. see through
D. get through
球后麻醉属于()
A.浸润麻醉
B.传导阻滞麻醉
C.球筋膜下麻醉
D.眼肌麻醉