[名词解释] HIS

简述胃粘膜的自我保护机制。 转炉吹炼的（）是碳激烈氧化期。 ["吹炼前期","吹炼中期","吹炼后期"] 正常情况下着陆5秒后（）将THS设置到零位 ["ELAC2；","ELAC1；","SEC2；","SEC1。"] 真空下碳的脱氧能力比常压下（）。 ["强","弱","差不多"] 每一个升降舵伺服机构与几部EFCS计算机直接相连（） ["2；","3；","4。"] HIS