题目

静脉血流经心脏及相关血管时，正确的流动途径是 A. 左心房→左心室→主动脉              B. 右心房→右心室→肺动脉 C. 左心房→左心室→肺动脉              D. 右心房→右心室→主动脉                                                                                                                                Where else have you visited ____ Beijing?A. beside B. except C. besides