----At 9:40 my wife gave birth to a nine-pound baby boy. ----- Oh, _______! A. all the best B. Never mind C. Well done D. Congratulations 答案:D用向下排气法在容积为V mL的集气瓶中收集氨气,由于空气尚未排净,最后瓶内气体的平均式量为19,将此盛满气体的集气瓶倒置于水中,瓶内水马上升到一定高度后,即停止上升,则在同温同压下,瓶内剩余气体的体积为( )A.V4mLB.V5mLC.V6mLD.无法判断