This is the best film I have _____ seen. [ ]
A. never
B. ever
C. always
D. often
答案:B
重症肌无力患者哪组肌如急骤发生严重无力,以至不能维持换气功能即为危象
A.呼吸肌和膈肌
B.呼吸肌和延髓肌
C.呼吸肌和面肌
D.呼吸肌和颈肌
E.呼吸肌和眼外肌
心肺复苏法的三项基本措施是通畅气道、口对口人工呼吸和胸外按压。()