电机设备的防护等级F是指电机绝缘防护等级。
参考答案:对
She managed to be back on her feet and, , continued to look upon life as a positive experience.
A.to her surprise
B.to her credit
C.to her knowledge
D.to her face
患者,男性,16岁,因右下肢肌肉血肿,关节腔出血,两天入院,以往有多次发作史,家族中其舅舅有类似病史。
该患者血液中哪种凝血因子减少或缺乏()。
A.纤维蛋白原
B.凝血酶原
C.Ⅶ因子
D.Ⅻ因子
E.Ⅷ因子