A. The pilot of the first plane make a big mistake. B. They avoided each other by turning in different directions. C. They narrowly escaped crashing into each other. D. One plane was suddenly out of control. 参考答案:C
第17题: [单项选择]妊娠心力衰竭的症状是() A. 轻微活动即有胸闷,气急,静息心率114次/分,呼吸22次/分 B. 心悸,气促,心界稍扩大,心尖区可闻及Ⅱ级柔和收缩期杂音 C. 气急,发绀,不能平卧,肺底部持续湿啰音,颈静脉充盈 D. 心悸,气急,心尖区可闻及Ⅲ级收缩期杂音及舒张期杂音 E. 心悸,气短,自幼即发绀,从未参加体力劳动,能平卧,肺无啰音 参考答案:C