颈椎骨折脱位，合并颈髓横断伤，早期可能出现( )
A．呼吸衰竭B．空气栓塞C．截瘫的肢体肌肉萎缩D．下肢关节畸形E．心衰
参考答案：A
狗常用粘有唾液的舌去舔伤口，结果对伤口愈合有利，主要原因是唾液里含有（ ）
A．抗体
B．抗菌素
C．溶菌酶
D．溶酶体
The object of plugging holes below the waterline on a ship should be to（）.
A.eliminate all water entering the hole
B.only plug holes in machinery or other vital spaces
C.reduce the entry of water as much as possible
D.plug the largest holes first
