【单选题】(84~85题共用题干) 病人,女,28岁,怕热多汗,心悸乏力,查:脉搏110次/分,血压130/70mmHg,双侧甲状腺弥漫性肿大,眼球突出,x线检查心肺无异常。 84、应首先考虑为
【简答题】In Halliday s Systemic Grammar, a system is a list of things between which it is possible to choose. So they are meanings, which the grammar can distinguish. The items in a system are called______.