气管闭合性损伤可出现（） ["咳嗽及咯血、呼吸困难、气肿、局部疼痛","疼痛、吐血或呕血、气肿","颈部血肿、神经受压、脑缺血等","空气逸出、刺激性咳嗽、呼吸困难","吞咽痛、吐血、呕血、皮下气肿、颈部可见食物及唾液溢出"]
颈动脉创伤性栓塞最可靠的诊断方法是（） ["CT检查","X线检查","B超检查","MRI检查","DSA检查"]
咽及食管闭合性损伤可出现（） ["咳嗽及咯血、呼吸困难、气肿、局部疼痛","疼痛、吐血或呕血、气肿","颈部血肿、神经受压、脑缺血等","空气逸出、刺激性咳嗽、呼吸困难","吞咽痛、吐血、呕血、皮下气肿、颈部可见食物及唾液溢出"]
当外力从正面直接撞击颈部时，主要损伤（） ["颈椎","颈部大血管","食管","喉、气管、甲状腺","颈部神经"]
颈丛皮支集中穿出的部位是（） ["胸锁乳突肌后缘近中点处","胸锁乳突肌前缘近中点处","胸锁乳突肌中上1/3处","胸锁乳突肌中下1/3处","穿过胸锁乳突肌"]
环境影响评价等级的三个划分依据是什么？
