题目

哺乳动物新出现的奇静脉及半奇静脉，相当于低等四足动物退化的后主静脉前段。请     问奇静脉和半奇静脉位于胸廓的位置是：     A.奇静脉和半奇静脉都位于胸廓的左侧  B．奇静脉和半奇静脉都位于胸廓的右侧     C.奇静脉位于胸廓的左侧，半奇静脉位于胸廓的右侧     D.奇静脉位于胸廓的右侧，半奇静脉位于胸廓的左侧—Is this _______ computer? —Yes, it's ________.My mother bought it for ________.A.you; me; my B.your; my; me C.yours; mine; I D.your; mine; me