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According to Annex Ⅳ of comminuted and disinfected sewage using an approved system can be discharged when the ship is more than away from the nearest land()
血中还原血红蛋白至少达多少时,皮肤黏膜可出现发绀()..
男性,20岁。从马上摔下,头后枕部着地,颈部活动受限,下颈.....
人造石材长度、宽度、厚度偏差的允许值为规定尺寸的()%。..
开挖隧道进行洞内爆破时,人员应撤至洞外,当隧道太长时,单.....
()清代的票号是以经营汇兑为主的信用机构,为山西人首创。..
划线的划针伸出夹紧位置以外()水平位置夹紧划针,防止松动..