关于第三心音,描述错误的是
A.出现于心室舒张早期B.在心尖部听诊最清楚C.正常青少年可听到D.一般在坐位增强E.持续时间短
参考答案:D
___ sleep were drowned in the flood.
A.A number of
B.The number of
C.A good many of
D.quantities
制造费用