第13题:[单选题]When is the flight plan optimized? A. only after flight crew revise it B. anytime when flight crew change the altitude or engine thrust C. it is continuously updated according to the environment and aircraft weight 参考答案:C
第35题: [单项选择]宫内节育器的并发症下列说法不正确的是() A. 节育器脱落 B. 输卵管炎 C. 节育器嵌顿 D. 节育器异位 E. 带器妊娠 参考答案:B 答案解析:宫内节育器的并发症包括节育器脱落、节育器嵌顿、节育器异位,带器妊娠因手术时未将节育器放置于子宫底部;节育器号过大,子宫收缩使节育器下移;型号偏小,降至宫腔下部;双子宫者节育器只放入一侧宫腔;或节育器嵌