【正确答案】正确答案：① vehicle; vessel, boat, van, truck, jet, subway, metro; another possible hyponym of vehicle; helicopter(1 point) ② vessel and boat: deck and sail; traveling on the water; another possible co-hyponym of vessel and boat: ship; another possible co-hyponym of deck and sail: oar(1 point) ③ jet; wing; flying through the air; another possible hyponym of jet and co-hyponym of wing: airframe(1 point) ④ truck and van, traveling on the land; another possible co-hyponym of truck and van: car(1 point) ⑤ subway and metro, traveling underground; another possible synonym of subway and metro: underground(1 point) ⑥ All these vehicles contain engines.(1 point) In group ①, the semantic relation between "vehicle" and the others is hyponymy.(2 points) In group ②, the semantic relation between " vessel and boat" and " deck and sail" is hyponymy; "vessel" and "boat" are co-hyponyms of each other; "deck" and "sail" are also co-hyponyms of each other. (2 points) In group ③, the semantic relation between "jet" and "wing" is hyponymy.(2 points) In group ④, "truck" and "van" are co-hyponyms of each other.(2 points) In group ⑤, the relation between "subway" and "metro" is synonymy and they are dialectal synonyms. (2 points) Vessel, boat, van, truck, jet, subway and metro are co-hyponyms of each other.(2 points)

【答案解析】解析：考查涵义关系。词与词之间有不同的涵义关系，一般来说公认的有i种：相同关系、对立关系及内包关系。同义关系指意义的相同或相近，意义上相近的词叫做同义词。同义词又分为方言同义词、语体同义词、情感同义词、搭配同义词及语义细微差别同义词。上下义关系是一种类和成员间的关系。位于这种意义关系上位的词语，即类名，叫做上坐标词；居于下位的是成员，叫做下义词。