单项选择题If the authority gradient is too steep( )A. the first officer may be unlikely to contribute anything to the decision making process even when he is sure that the captain has made a mistake!B. The first officer respects the captain's command status but feels free to contribute.C. the first officer may be likely to contribute anything to the decision making process
单项选择题总体国家安全观是什么时间首次提出的?