葡萄糖-6-磷酸脱氢酶正常时能保护红细胞免受氧化物质的威胁,此酶异常时表现为缺乏症,这是一种常见的单基因遗传病,患者绝大多数平时没有贫血和临床症状,但在一定条件下,如使用氧化剂药物、食用蚕豆等,可能发生明显的溶血性贫血。
_____thishashappenedonoccasion,thisistheexceptionanddefinitelynottherule.
InfacttheSwedendidnotunderstandthethreequestions____wereaskedinFrench.
We thank you for your letter of May 27 and the _____ illustrated catalogue.