与凝血有关系的维生素是______。
参考答案:维生素K
—How long did the meeting last this afternoon?
—It was supper time _________ the meeting was over.
A.that
B.at which
C.when
D.until
芋头的根膨大为球形、卵形、椭圆形、块形,为食用部分。( )