何时红色的RA故障旗出现在PFD上().
A.当RA1失效
B.当RA2失效
C.RA1和2均失效,同时缝翼放出
D.RA1和2均失效,同时飞机低于2500ft
参考答案:C
This is the second time I by him;I shall never trust him again. [ ]
A. was put down
B. have been let down
C. have been put down
D. am let down
患者,女性,41岁。患高血压20余年,今日突发头痛、视物模糊、失语,测血压210/130mmHg。急诊入院,对该患者应首选的降压药物是()
A.硝普钠
B.呋塞米
C.硝酸甘油
D.维拉帕米
E.卡托普利