If you suffer an injury during ______ exercise, or if _______ pain or discomfort makes you think an injury is developing, stop right away and call me.

A．the; a

B．不填; the

C．an; the

D．不填; 不填

对劫机恐怖事件的处置原则不包括（）。

A.安全第一

B.适时果断处置

C.力争在空中处置

D.力争在境内处置